Player Feedback, Part II

src/generated/resources/.cache/cache

@@ -140,7 +140,7 @@ de8a40b7daf1497d5aecee47a43b3e0b1d030b00 assets/create/blockstates/fancy_scoria_
 fc9ac0a7e7191b93516719455a17177fa6524ecc assets/create/blockstates/fancy_weathered_limestone_bricks_slab.json
 b2a7c321b1795f20e7433f81a55ce4683de081b8 assets/create/blockstates/fancy_weathered_limestone_bricks_stairs.json
 6372fe02ba0065acb0758121c45a15a1a8fdc5de assets/create/blockstates/fancy_weathered_limestone_bricks_wall.json
-4c3e0500f9382d2e426e823fe876f57f4d7ee3b4 assets/create/blockstates/fluid_pipe.json
+6106fc0a0f9d83da89c3e8af98e7c45232602c23 assets/create/blockstates/fluid_pipe.json
 f0eaab18e16c4f3f65ebf3b55b08f0dc445720fe assets/create/blockstates/fluid_tank.json
 5408d92ab02af86539ac42971d4033545970bb3a assets/create/blockstates/fluid_valve.json
 e9da1794b6ece7f9aa8bcb43d42c23a55446133b assets/create/blockstates/flywheel.json
@@ -335,7 +335,7 @@ e8b0a401c10d1ba67ed71ba31bd5f9bc28571b65 assets/create/blockstates/powered_toggl
 d06cd9a1101b18d306a786320aab12018b1325d6 assets/create/blockstates/purple_sail.json
 92957119abd5fbcca36a113b2a80255fd70fc303 assets/create/blockstates/purple_seat.json
 61035f8afe75ff7bbd291da5d8690bcbebe679eb assets/create/blockstates/purple_valve_handle.json
-bdd56f32ce0a148b6e466a55ab2777f69fc08cfc assets/create/blockstates/radial_chassis.json
+143d66a7262ccd29f36784d6b064d4a13ba374b6 assets/create/blockstates/radial_chassis.json
 45877c4d90a7185c2f304edbd67379d800920439 assets/create/blockstates/red_sail.json
 da1b08387af7afa0855ee8d040f620c01f20660a assets/create/blockstates/red_seat.json
 722fc77bbf387af8a4016e42cbf9501d2b968881 assets/create/blockstates/red_valve_handle.json
@@ -399,16 +399,16 @@ a3a11524cd3515fc01d905767b4b7ea782adaf03 assets/create/blockstates/yellow_seat.j
 7f39521b211441f5c3e06d60c5978cebe16cacfb assets/create/blockstates/zinc_block.json
 b7181bcd8182b2f17088e5aa881f374c9c65470c assets/create/blockstates/zinc_ore.json
 df67c2c11fa22487d3a0fdc9b008056e593d14e3 assets/create/lang/en_ud.json
-3ad443f44eb33fe8c3ac092d1532dcbd27e49c84 assets/create/lang/en_us.json
+9fa2b840f81a9d61e25af4718a4948ee762ef0a8 assets/create/lang/en_us.json
-612a63d73f7f4b8e79dce3f53ddbe3345f0e74d8 assets/create/lang/unfinished/de_de.json
+ebe9ae0de05c542426e1fc9eeb865cad08f7c6a0 assets/create/lang/unfinished/de_de.json
-2e37dc718a8dea2af85daba7266c877ce80ff35b assets/create/lang/unfinished/fr_fr.json
+f2525e7139a8e5aaac2fed2a562ad13a295f0e4e assets/create/lang/unfinished/fr_fr.json
-f843761728c403276b7a47282f4fdd039b5b6854 assets/create/lang/unfinished/it_it.json
+30db009b45db33814b43f15d09775de2f9cad091 assets/create/lang/unfinished/it_it.json
-8b90c66fd5974c993e83bfa5733ca03187211d28 assets/create/lang/unfinished/ja_jp.json
+25c2d05bfcdd0e64e889ca6ff36377d933f35e87 assets/create/lang/unfinished/ja_jp.json
-59db0a3cff42707ecb828b975ef1fcba2a21a521 assets/create/lang/unfinished/ko_kr.json
+7a4f40c3a6851714a450173f0c2f1e5689d96025 assets/create/lang/unfinished/ko_kr.json
-b1900a6cce7216a4baa844affa169cfb32ff645c assets/create/lang/unfinished/nl_nl.json
+c2b4070659ce9a0a44cbaa37beef3b0217d15c00 assets/create/lang/unfinished/nl_nl.json
-d3f09a37b1f4ec5d53effc2b87efbccf2df2b7c7 assets/create/lang/unfinished/pt_br.json
+9cfe6a2af979661bbdcc78edc28ab07b9a8f2f43 assets/create/lang/unfinished/pt_br.json
-16c92dab525ba20e85b65ee084f7b760432dcb73 assets/create/lang/unfinished/ru_ru.json
+590368f1507e77d67c416299188b2e147e0a9616 assets/create/lang/unfinished/ru_ru.json
-c8b5c2a3a65468950aa713a56bf1c930eef81305 assets/create/lang/unfinished/zh_cn.json
+719105e25c79198ad76bd1782499545ce0f8a3ce assets/create/lang/unfinished/zh_cn.json
 846200eb548d3bfa2e77b41039de159b4b6cfb45 assets/create/models/block/acacia_window.json
 1930fa3a3c98d53dd19e4ee7f55bc27fd47aa281 assets/create/models/block/acacia_window_pane_noside.json
 1763ea2c9b981d187f5031ba608f3d5d3be3986a assets/create/models/block/acacia_window_pane_noside_alt.json

src/generated/resources/assets/create/lang/en_us.json

@@ -819,6 +819,12 @@
 	"create.gui.goggles.kinetic_stats": "Kinetic Stats:",
 	"create.gui.goggles.at_current_speed": "at current speed",
 	"create.gui.goggles.pole_length": "Pole Length:",
+	"create.gui.assembly.exception": "This Contraption was unable to assemble:",
+	"create.gui.assembly.exception.unmovableBlock": "Unmovable Block (%4$s) at [%1$s %2$s %3$s]",
+	"create.gui.assembly.exception.chunkNotLoaded": "The Block at [%1$s %2$s %3$s] was not in a loaded chunk",
+	"create.gui.assembly.exception.structureTooLarge": "There are too many Blocks included in the contraption.\nThe configured maximum is: %1$s",
+	"create.gui.assembly.exception.tooManyPistonPoles": "There are too many extension Poles attached to this Piston.\nThe configured maximum is: %1$s",
+	"create.gui.assembly.exception.noPistonPoles": "The Piston is missing some extension Poles",
 	"create.gui.gauge.info_header": "Gauge Information:",
 	"create.gui.speedometer.title": "Rotation Speed",
 	"create.gui.stressometer.title": "Network Stress",

src/generated/resources/assets/create/lang/unfinished/de_de.json

@@ -1,5 +1,5 @@
 {
-	"_": "Missing Localizations: 1211",
+	"_": "Missing Localizations: 1217",
 
 	"_": "->------------------------]  Game Elements  [------------------------<-",
 
@@ -820,6 +820,12 @@
 	"create.gui.goggles.kinetic_stats": "UNLOCALIZED: Kinetic Stats:",
 	"create.gui.goggles.at_current_speed": "UNLOCALIZED: at current speed",
 	"create.gui.goggles.pole_length": "UNLOCALIZED: Pole Length:",
+	"create.gui.assembly.exception": "UNLOCALIZED: This Contraption was unable to assemble:",
+	"create.gui.assembly.exception.unmovableBlock": "UNLOCALIZED: Unmovable Block (%4$s) at [%1$s %2$s %3$s]",
+	"create.gui.assembly.exception.chunkNotLoaded": "UNLOCALIZED: The Block at [%1$s %2$s %3$s] was not in a loaded chunk",
+	"create.gui.assembly.exception.structureTooLarge": "UNLOCALIZED: There are too many Blocks included in the contraption.\nThe configured maximum is: %1$s",
+	"create.gui.assembly.exception.tooManyPistonPoles": "UNLOCALIZED: There are too many extension Poles attached to this Piston.\nThe configured maximum is: %1$s",
+	"create.gui.assembly.exception.noPistonPoles": "UNLOCALIZED: The Piston is missing some extension Poles",
 	"create.gui.gauge.info_header": "UNLOCALIZED: Gauge Information:",
 	"create.gui.speedometer.title": "UNLOCALIZED: Rotation Speed",
 	"create.gui.stressometer.title": "UNLOCALIZED: Network Stress",

src/generated/resources/assets/create/lang/unfinished/fr_fr.json

@@ -1,5 +1,5 @@
 {
-	"_": "Missing Localizations: 862",
+	"_": "Missing Localizations: 868",
 
 	"_": "->------------------------]  Game Elements  [------------------------<-",
 
@@ -820,6 +820,12 @@
 	"create.gui.goggles.kinetic_stats": "Statistiques cinétiques:",
 	"create.gui.goggles.at_current_speed": "À la vitesse actuelle",
 	"create.gui.goggles.pole_length": "UNLOCALIZED: Pole Length:",
+	"create.gui.assembly.exception": "UNLOCALIZED: This Contraption was unable to assemble:",
+	"create.gui.assembly.exception.unmovableBlock": "UNLOCALIZED: Unmovable Block (%4$s) at [%1$s %2$s %3$s]",
+	"create.gui.assembly.exception.chunkNotLoaded": "UNLOCALIZED: The Block at [%1$s %2$s %3$s] was not in a loaded chunk",
+	"create.gui.assembly.exception.structureTooLarge": "UNLOCALIZED: There are too many Blocks included in the contraption.\nThe configured maximum is: %1$s",
+	"create.gui.assembly.exception.tooManyPistonPoles": "UNLOCALIZED: There are too many extension Poles attached to this Piston.\nThe configured maximum is: %1$s",
+	"create.gui.assembly.exception.noPistonPoles": "UNLOCALIZED: The Piston is missing some extension Poles",
 	"create.gui.gauge.info_header": "Informations sur la jauge:",
 	"create.gui.speedometer.title": "Vitesse de rotation",
 	"create.gui.stressometer.title": "Stress du réseau",

src/generated/resources/assets/create/lang/unfinished/it_it.json

@@ -1,5 +1,5 @@
 {
-	"_": "Missing Localizations: 846",
+	"_": "Missing Localizations: 852",
 
 	"_": "->------------------------]  Game Elements  [------------------------<-",
 
@@ -820,6 +820,12 @@
 	"create.gui.goggles.kinetic_stats": "Statistiche Cinetiche:",
 	"create.gui.goggles.at_current_speed": "Alla velocità Attuale",
 	"create.gui.goggles.pole_length": "UNLOCALIZED: Pole Length:",
+	"create.gui.assembly.exception": "UNLOCALIZED: This Contraption was unable to assemble:",
+	"create.gui.assembly.exception.unmovableBlock": "UNLOCALIZED: Unmovable Block (%4$s) at [%1$s %2$s %3$s]",
+	"create.gui.assembly.exception.chunkNotLoaded": "UNLOCALIZED: The Block at [%1$s %2$s %3$s] was not in a loaded chunk",
+	"create.gui.assembly.exception.structureTooLarge": "UNLOCALIZED: There are too many Blocks included in the contraption.\nThe configured maximum is: %1$s",
+	"create.gui.assembly.exception.tooManyPistonPoles": "UNLOCALIZED: There are too many extension Poles attached to this Piston.\nThe configured maximum is: %1$s",
+	"create.gui.assembly.exception.noPistonPoles": "UNLOCALIZED: The Piston is missing some extension Poles",
 	"create.gui.gauge.info_header": "Informazioni sul Calibro:",
 	"create.gui.speedometer.title": "Velocità di Rotazione",
 	"create.gui.stressometer.title": "Stress della Rete",

src/generated/resources/assets/create/lang/unfinished/ja_jp.json

@@ -1,5 +1,5 @@
 {
-	"_": "Missing Localizations: 845",
+	"_": "Missing Localizations: 851",
 
 	"_": "->------------------------]  Game Elements  [------------------------<-",
 
@@ -820,6 +820,12 @@
 	"create.gui.goggles.kinetic_stats": "動力の統計:",
 	"create.gui.goggles.at_current_speed": "現在の速度",
 	"create.gui.goggles.pole_length": "UNLOCALIZED: Pole Length:",
+	"create.gui.assembly.exception": "UNLOCALIZED: This Contraption was unable to assemble:",
+	"create.gui.assembly.exception.unmovableBlock": "UNLOCALIZED: Unmovable Block (%4$s) at [%1$s %2$s %3$s]",
+	"create.gui.assembly.exception.chunkNotLoaded": "UNLOCALIZED: The Block at [%1$s %2$s %3$s] was not in a loaded chunk",
+	"create.gui.assembly.exception.structureTooLarge": "UNLOCALIZED: There are too many Blocks included in the contraption.\nThe configured maximum is: %1$s",
+	"create.gui.assembly.exception.tooManyPistonPoles": "UNLOCALIZED: There are too many extension Poles attached to this Piston.\nThe configured maximum is: %1$s",
+	"create.gui.assembly.exception.noPistonPoles": "UNLOCALIZED: The Piston is missing some extension Poles",
 	"create.gui.gauge.info_header": "計器の情報:",
 	"create.gui.speedometer.title": "回転速度",
 	"create.gui.stressometer.title": "ネットワークの応力",

src/generated/resources/assets/create/lang/unfinished/ko_kr.json

@@ -1,5 +1,5 @@
 {
-	"_": "Missing Localizations: 52",
+	"_": "Missing Localizations: 58",
 
 	"_": "->------------------------]  Game Elements  [------------------------<-",
 
@@ -820,6 +820,12 @@
 	"create.gui.goggles.kinetic_stats": "가동 상태:",
 	"create.gui.goggles.at_current_speed": "현재 에너지량",
 	"create.gui.goggles.pole_length": "UNLOCALIZED: Pole Length:",
+	"create.gui.assembly.exception": "UNLOCALIZED: This Contraption was unable to assemble:",
+	"create.gui.assembly.exception.unmovableBlock": "UNLOCALIZED: Unmovable Block (%4$s) at [%1$s %2$s %3$s]",
+	"create.gui.assembly.exception.chunkNotLoaded": "UNLOCALIZED: The Block at [%1$s %2$s %3$s] was not in a loaded chunk",
+	"create.gui.assembly.exception.structureTooLarge": "UNLOCALIZED: There are too many Blocks included in the contraption.\nThe configured maximum is: %1$s",
+	"create.gui.assembly.exception.tooManyPistonPoles": "UNLOCALIZED: There are too many extension Poles attached to this Piston.\nThe configured maximum is: %1$s",
+	"create.gui.assembly.exception.noPistonPoles": "UNLOCALIZED: The Piston is missing some extension Poles",
 	"create.gui.gauge.info_header": "게이지 정보:",
 	"create.gui.speedometer.title": "회전 속도",
 	"create.gui.stressometer.title": "네트워크 부하",

src/generated/resources/assets/create/lang/unfinished/nl_nl.json

@@ -1,5 +1,5 @@
 {
-	"_": "Missing Localizations: 1152",
+	"_": "Missing Localizations: 1158",
 
 	"_": "->------------------------]  Game Elements  [------------------------<-",
 
@@ -820,6 +820,12 @@
 	"create.gui.goggles.kinetic_stats": "UNLOCALIZED: Kinetic Stats:",
 	"create.gui.goggles.at_current_speed": "UNLOCALIZED: at current speed",
 	"create.gui.goggles.pole_length": "UNLOCALIZED: Pole Length:",
+	"create.gui.assembly.exception": "UNLOCALIZED: This Contraption was unable to assemble:",
+	"create.gui.assembly.exception.unmovableBlock": "UNLOCALIZED: Unmovable Block (%4$s) at [%1$s %2$s %3$s]",
+	"create.gui.assembly.exception.chunkNotLoaded": "UNLOCALIZED: The Block at [%1$s %2$s %3$s] was not in a loaded chunk",
+	"create.gui.assembly.exception.structureTooLarge": "UNLOCALIZED: There are too many Blocks included in the contraption.\nThe configured maximum is: %1$s",
+	"create.gui.assembly.exception.tooManyPistonPoles": "UNLOCALIZED: There are too many extension Poles attached to this Piston.\nThe configured maximum is: %1$s",
+	"create.gui.assembly.exception.noPistonPoles": "UNLOCALIZED: The Piston is missing some extension Poles",
 	"create.gui.gauge.info_header": "UNLOCALIZED: Gauge Information:",
 	"create.gui.speedometer.title": "UNLOCALIZED: Rotation Speed",
 	"create.gui.stressometer.title": "UNLOCALIZED: Network Stress",

src/generated/resources/assets/create/lang/unfinished/pt_br.json

@@ -1,5 +1,5 @@
 {
-	"_": "Missing Localizations: 1218",
+	"_": "Missing Localizations: 1224",
 
 	"_": "->------------------------]  Game Elements  [------------------------<-",
 
@@ -820,6 +820,12 @@
 	"create.gui.goggles.kinetic_stats": "UNLOCALIZED: Kinetic Stats:",
 	"create.gui.goggles.at_current_speed": "UNLOCALIZED: at current speed",
 	"create.gui.goggles.pole_length": "UNLOCALIZED: Pole Length:",
+	"create.gui.assembly.exception": "UNLOCALIZED: This Contraption was unable to assemble:",
+	"create.gui.assembly.exception.unmovableBlock": "UNLOCALIZED: Unmovable Block (%4$s) at [%1$s %2$s %3$s]",
+	"create.gui.assembly.exception.chunkNotLoaded": "UNLOCALIZED: The Block at [%1$s %2$s %3$s] was not in a loaded chunk",
+	"create.gui.assembly.exception.structureTooLarge": "UNLOCALIZED: There are too many Blocks included in the contraption.\nThe configured maximum is: %1$s",
+	"create.gui.assembly.exception.tooManyPistonPoles": "UNLOCALIZED: There are too many extension Poles attached to this Piston.\nThe configured maximum is: %1$s",
+	"create.gui.assembly.exception.noPistonPoles": "UNLOCALIZED: The Piston is missing some extension Poles",
 	"create.gui.gauge.info_header": "UNLOCALIZED: Gauge Information:",
 	"create.gui.speedometer.title": "UNLOCALIZED: Rotation Speed",
 	"create.gui.stressometer.title": "UNLOCALIZED: Network Stress",

src/generated/resources/assets/create/lang/unfinished/ru_ru.json

@@ -1,5 +1,5 @@
 {
-	"_": "Missing Localizations: 2",
+	"_": "Missing Localizations: 8",
 
 	"_": "->------------------------]  Game Elements  [------------------------<-",
 
@@ -820,6 +820,12 @@
 	"create.gui.goggles.kinetic_stats": "Кинетическая статистика:",
 	"create.gui.goggles.at_current_speed": "На текущей скорости",
 	"create.gui.goggles.pole_length": "Длина поршня",
+	"create.gui.assembly.exception": "UNLOCALIZED: This Contraption was unable to assemble:",
+	"create.gui.assembly.exception.unmovableBlock": "UNLOCALIZED: Unmovable Block (%4$s) at [%1$s %2$s %3$s]",
+	"create.gui.assembly.exception.chunkNotLoaded": "UNLOCALIZED: The Block at [%1$s %2$s %3$s] was not in a loaded chunk",
+	"create.gui.assembly.exception.structureTooLarge": "UNLOCALIZED: There are too many Blocks included in the contraption.\nThe configured maximum is: %1$s",
+	"create.gui.assembly.exception.tooManyPistonPoles": "UNLOCALIZED: There are too many extension Poles attached to this Piston.\nThe configured maximum is: %1$s",
+	"create.gui.assembly.exception.noPistonPoles": "UNLOCALIZED: The Piston is missing some extension Poles",
 	"create.gui.gauge.info_header": "Калибровочная информация:",
 	"create.gui.speedometer.title": "Скорость вращения",
 	"create.gui.stressometer.title": "Сетевой момент",

src/generated/resources/assets/create/lang/unfinished/zh_cn.json

@@ -1,5 +1,5 @@
 {
-	"_": "Missing Localizations: 5",
+	"_": "Missing Localizations: 11",
 
 	"_": "->------------------------]  Game Elements  [------------------------<-",
 
@@ -820,6 +820,12 @@
 	"create.gui.goggles.kinetic_stats": "动力学状态:",
 	"create.gui.goggles.at_current_speed": "当前速度应力值",
 	"create.gui.goggles.pole_length": "UNLOCALIZED: Pole Length:",
+	"create.gui.assembly.exception": "UNLOCALIZED: This Contraption was unable to assemble:",
+	"create.gui.assembly.exception.unmovableBlock": "UNLOCALIZED: Unmovable Block (%4$s) at [%1$s %2$s %3$s]",
+	"create.gui.assembly.exception.chunkNotLoaded": "UNLOCALIZED: The Block at [%1$s %2$s %3$s] was not in a loaded chunk",
+	"create.gui.assembly.exception.structureTooLarge": "UNLOCALIZED: There are too many Blocks included in the contraption.\nThe configured maximum is: %1$s",
+	"create.gui.assembly.exception.tooManyPistonPoles": "UNLOCALIZED: There are too many extension Poles attached to this Piston.\nThe configured maximum is: %1$s",
+	"create.gui.assembly.exception.noPistonPoles": "UNLOCALIZED: The Piston is missing some extension Poles",
 	"create.gui.gauge.info_header": "仪表信息:",
 	"create.gui.speedometer.title": "旋转速度",
 	"create.gui.stressometer.title": "网络应力",

src/main/java/com/simibubi/create/content/contraptions/components/structureMovement/AssemblyException.java

@@ -1,23 +1,52 @@
 package com.simibubi.create.content.contraptions.components.structureMovement;
 
+import com.simibubi.create.foundation.config.AllConfigs;
 import net.minecraft.block.BlockState;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.text.ITextComponent;
 import net.minecraft.util.text.TranslationTextComponent;
 
-public class AssemblyException extends RuntimeException {
+public class AssemblyException extends Exception {
-	public final ITextComponent message;
+	public final ITextComponent component;
 
-	public AssemblyException(ITextComponent message) {
+	public AssemblyException(ITextComponent component) {
-		this.message = message;
+		this.component = component;
 	}
 
 	public AssemblyException(String langKey, Object... objects) {
-		this(new TranslationTextComponent("gui.goggles.contraptions." + langKey, objects));
+		this(new TranslationTextComponent("create.gui.assembly.exception." + langKey, objects));
 	}
 
 	public static AssemblyException unmovableBlock(BlockPos pos, BlockState state) {
-		return new AssemblyException("unmovableBlock", pos.getX(), pos.getY(), pos.getZ(),
+		return new AssemblyException("unmovableBlock",
+				pos.getX(),
+				pos.getY(),
+				pos.getZ(),
 				new TranslationTextComponent(state.getBlock().getTranslationKey()));
 	}
+
+	public static AssemblyException unloadedChunk(BlockPos pos) {
+		return new AssemblyException("chunkNotLoaded",
+				pos.getX(),
+				pos.getY(),
+				pos.getZ());
+	}
+
+	public static AssemblyException structureTooLarge() {
+		return new AssemblyException("structureTooLarge",
+				AllConfigs.SERVER.kinetics.maxBlocksMoved.get());
+	}
+
+	public static AssemblyException tooManyPistonPoles() {
+		return new AssemblyException("tooManyPistonPoles",
+				AllConfigs.SERVER.kinetics.maxPistonPoles.get());
+	}
+
+	public static AssemblyException noPistonPoles() {
+		return new AssemblyException("noPistonPoles");
+	}
+
+	public String getFormattedText() {
+		return component.getFormattedText();
+	}
 }

src/main/java/com/simibubi/create/content/contraptions/components/structureMovement/Contraption.java

@@ -1,28 +1,5 @@
 package com.simibubi.create.content.contraptions.components.structureMovement;
 
-import static com.simibubi.create.content.contraptions.components.structureMovement.piston.MechanicalPistonBlock.isExtensionPole;
-import static com.simibubi.create.content.contraptions.components.structureMovement.piston.MechanicalPistonBlock.isPistonHead;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Iterator;
-import java.util.LinkedList;
-import java.util.List;
-import java.util.Map;
-import java.util.Optional;
-import java.util.Queue;
-import java.util.Set;
-import java.util.UUID;
-import java.util.function.BiConsumer;
-import java.util.stream.Collectors;
-
-import javax.annotation.Nullable;
-
-import org.apache.commons.lang3.tuple.MutablePair;
-import org.apache.commons.lang3.tuple.Pair;
-
 import com.simibubi.create.AllBlocks;
 import com.simibubi.create.AllMovementBehaviours;
 import com.simibubi.create.content.contraptions.base.KineticTileEntity;
@@ -52,15 +29,7 @@ import com.simibubi.create.foundation.utility.Iterate;
 import com.simibubi.create.foundation.utility.NBTHelper;
 import com.simibubi.create.foundation.utility.VecHelper;
 import com.simibubi.create.foundation.utility.worldWrappers.WrappedWorld;
-
+import net.minecraft.block.*;
-import net.minecraft.block.AbstractButtonBlock;
-import net.minecraft.block.Block;
-import net.minecraft.block.BlockState;
-import net.minecraft.block.Blocks;
-import net.minecraft.block.ChestBlock;
-import net.minecraft.block.DoorBlock;
-import net.minecraft.block.IWaterLoggable;
-import net.minecraft.block.PressurePlateBlock;
 import net.minecraft.block.material.PushReaction;
 import net.minecraft.entity.Entity;
 import net.minecraft.fluid.Fluids;
@@ -92,6 +61,16 @@ import net.minecraftforge.fluids.capability.IFluidHandler.FluidAction;
 import net.minecraftforge.fluids.capability.templates.FluidTank;
 import net.minecraftforge.items.IItemHandlerModifiable;
 import net.minecraftforge.items.wrapper.CombinedInvWrapper;
+import org.apache.commons.lang3.tuple.MutablePair;
+import org.apache.commons.lang3.tuple.Pair;
+
+import javax.annotation.Nullable;
+import java.util.*;
+import java.util.function.BiConsumer;
+import java.util.stream.Collectors;
+
+import static com.simibubi.create.content.contraptions.components.structureMovement.piston.MechanicalPistonBlock.isExtensionPole;
+import static com.simibubi.create.content.contraptions.components.structureMovement.piston.MechanicalPistonBlock.isPistonHead;
 
 public abstract class Contraption {
 
@@ -150,7 +129,7 @@ public abstract class Contraption {
 	}
 
 	protected boolean addToInitialFrontier(World world, BlockPos pos, Direction forcedDirection,
-		Queue<BlockPos> frontier) {
+		Queue<BlockPos> frontier) throws AssemblyException {
 		return true;
 	}
 
@@ -161,7 +140,7 @@ public abstract class Contraption {
 		return contraption;
 	}
 
-	public boolean searchMovedStructure(World world, BlockPos pos, @Nullable Direction forcedDirection) {
+	public boolean searchMovedStructure(World world, BlockPos pos, @Nullable Direction forcedDirection) throws AssemblyException {
 		initialPassengers.clear();
 		Queue<BlockPos> frontier = new LinkedList<>();
 		Set<BlockPos> visited = new HashSet<>();
@@ -180,7 +159,7 @@ public abstract class Contraption {
 			if (!moveBlock(world, forcedDirection, frontier, visited))
 				return false;
 		}
-		throw new AssemblyException("structureTooLarge");
+		throw AssemblyException.structureTooLarge();
 	}
 
 	public void onEntityCreated(AbstractContraptionEntity entity) {
@@ -249,7 +228,7 @@ public abstract class Contraption {
 
 	/** move the first block in frontier queue */
 	protected boolean moveBlock(World world, @Nullable Direction forcedDirection, Queue<BlockPos> frontier,
-		Set<BlockPos> visited) {
+		Set<BlockPos> visited) throws AssemblyException {
 		BlockPos pos = frontier.poll();
 		if (pos == null)
 			return false;
@@ -258,7 +237,7 @@ public abstract class Contraption {
 		if (World.isOutsideBuildHeight(pos))
 			return true;
 		if (!world.isBlockPresent(pos))
-			throw new AssemblyException("chunkNotLoaded");
+			throw AssemblyException.unloadedChunk(pos);
 		if (isAnchoringBlockAt(pos))
 			return true;
 		BlockState state = world.getBlockState(pos);
@@ -348,7 +327,7 @@ public abstract class Contraption {
 		if (blocks.size() <= AllConfigs.SERVER.kinetics.maxBlocksMoved.get())
 			return true;
 		else
-			throw new AssemblyException("structureTooLarge");
+			throw AssemblyException.structureTooLarge();
 	}
 
 	private void moveBearing(BlockPos pos, Queue<BlockPos> frontier, Set<BlockPos> visited, BlockState state) {
@@ -402,7 +381,7 @@ public abstract class Contraption {
 	}
 
 	private boolean moveMechanicalPiston(World world, BlockPos pos, Queue<BlockPos> frontier, Set<BlockPos> visited,
-		BlockState state) {
+		BlockState state) throws AssemblyException {
 		int limit = AllConfigs.SERVER.kinetics.maxPistonPoles.get();
 		Direction direction = state.get(MechanicalPistonBlock.FACING);
 		if (state.get(MechanicalPistonBlock.STATE) == PistonState.EXTENDED) {
@@ -424,7 +403,7 @@ public abstract class Contraption {
 				break;
 			}
 			if (limit <= -1)
-				throw new AssemblyException("tooManyPistonPoles");
+				throw AssemblyException.tooManyPistonPoles();
 		}
 
 		BlockPos searchPos = pos;
@@ -443,7 +422,7 @@ public abstract class Contraption {
 		}
 
 		if (limit <= -1)
-			throw new AssemblyException("tooManyPistonPoles");
+			throw AssemblyException.tooManyPistonPoles();
 		return true;
 	}
 

src/main/java/com/simibubi/create/content/contraptions/components/structureMovement/IDisplayAssemblyExceptions.java

@@ -0,0 +1,28 @@
+package com.simibubi.create.content.contraptions.components.structureMovement;
+
+import com.simibubi.create.content.contraptions.goggles.IHaveGoggleInformation;
+import com.simibubi.create.foundation.utility.Lang;
+import net.minecraft.util.text.TextFormatting;
+
+import java.util.Arrays;
+import java.util.List;
+
+public interface IDisplayAssemblyExceptions {
+
+	default boolean addExceptionToTooltip(List<String> tooltip) {
+		AssemblyException e = getLastAssemblyException();
+		if (e == null)
+			return false;
+
+		if (!tooltip.isEmpty())
+			tooltip.add("");
+
+		tooltip.add(IHaveGoggleInformation.spacing + TextFormatting.GOLD + Lang.translate("gui.assembly.exception"));
+		String text = e.getFormattedText();
+		Arrays.stream(text.split("\n")).forEach(l -> tooltip.add(IHaveGoggleInformation.spacing + TextFormatting.GRAY + l));
+
+		return true;
+	}
+
+	AssemblyException getLastAssemblyException();
+}

src/main/java/com/simibubi/create/content/contraptions/components/structureMovement/bearing/ClockworkBearingTileEntity.java

@@ -1,13 +1,10 @@
 package com.simibubi.create.content.contraptions.components.structureMovement.bearing;
 
-import java.util.List;
-
-import org.apache.commons.lang3.tuple.Pair;
-
 import com.simibubi.create.content.contraptions.base.KineticTileEntity;
 import com.simibubi.create.content.contraptions.components.structureMovement.AbstractContraptionEntity;
 import com.simibubi.create.content.contraptions.components.structureMovement.AssemblyException;
 import com.simibubi.create.content.contraptions.components.structureMovement.ControlledContraptionEntity;
+import com.simibubi.create.content.contraptions.components.structureMovement.IDisplayAssemblyExceptions;
 import com.simibubi.create.content.contraptions.components.structureMovement.bearing.ClockworkContraption.HandType;
 import com.simibubi.create.foundation.advancement.AllTriggers;
 import com.simibubi.create.foundation.gui.AllIcons;
@@ -17,7 +14,6 @@ import com.simibubi.create.foundation.tileEntity.behaviour.scrollvalue.ScrollOpt
 import com.simibubi.create.foundation.utility.AngleHelper;
 import com.simibubi.create.foundation.utility.Lang;
 import com.simibubi.create.foundation.utility.ServerSpeedProvider;
-
 import net.minecraft.block.BlockState;
 import net.minecraft.nbt.CompoundNBT;
 import net.minecraft.state.properties.BlockStateProperties;
@@ -27,8 +23,11 @@ import net.minecraft.util.Direction.Axis;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.math.MathHelper;
 import net.minecraft.util.text.ITextComponent;
+import org.apache.commons.lang3.tuple.Pair;
 
-public class ClockworkBearingTileEntity extends KineticTileEntity implements IBearingTileEntity {
+import java.util.List;
+
+public class ClockworkBearingTileEntity extends KineticTileEntity implements IBearingTileEntity, IDisplayAssemblyExceptions {
 
 	protected ControlledContraptionEntity hourHand;
 	protected ControlledContraptionEntity minuteHand;
@@ -39,7 +38,7 @@ public class ClockworkBearingTileEntity extends KineticTileEntity implements IBe
 
 	protected boolean running;
 	protected boolean assembleNextTick;
-	protected ITextComponent lastException;
+	protected AssemblyException lastException;
 
 	protected ScrollOptionBehaviour<ClockHands> operationMode;
 
@@ -108,6 +107,11 @@ public class ClockworkBearingTileEntity extends KineticTileEntity implements IBe
 		applyRotations();
 	}
 
+	@Override
+	public AssemblyException getLastAssemblyException() {
+		return lastException;
+	}
+
 	protected void applyRotations() {
 		BlockState blockState = getBlockState();
 		Axis axis = Axis.X;
@@ -207,7 +211,8 @@ public class ClockworkBearingTileEntity extends KineticTileEntity implements IBe
 			contraption = ClockworkContraption.assembleClockworkAt(world, pos, direction);
 			lastException = null;
 		} catch (AssemblyException e) {
-			lastException = e.message;
+			lastException = e;
+			sendData();
 			return;
 		}
 		if (contraption == null)
@@ -294,7 +299,7 @@ public class ClockworkBearingTileEntity extends KineticTileEntity implements IBe
 		compound.putFloat("HourAngle", hourAngle);
 		compound.putFloat("MinuteAngle", minuteAngle);
 		if (lastException != null)
-			compound.putString("LastException", ITextComponent.Serializer.toJson(lastException));
+			compound.putString("LastException", ITextComponent.Serializer.toJson(lastException.component));
 		super.write(compound, clientPacket);
 	}
 
@@ -307,7 +312,7 @@ public class ClockworkBearingTileEntity extends KineticTileEntity implements IBe
 		hourAngle = compound.getFloat("HourAngle");
 		minuteAngle = compound.getFloat("MinuteAngle");
 		if (compound.contains("LastException"))
-			lastException = ITextComponent.Serializer.fromJson(compound.getString("LastException"));
+			lastException = new AssemblyException(ITextComponent.Serializer.fromJson(compound.getString("LastException")));
 		else
 			lastException = null;
 		super.read(compound, clientPacket);
@@ -408,12 +413,4 @@ public class ClockworkBearingTileEntity extends KineticTileEntity implements IBe
 		return pos;
 	}
 
-	@Override
-	public boolean addToGoggleTooltip(List<String> tooltip, boolean isPlayerSneaking) {
-		boolean added = super.addToGoggleTooltip(tooltip, isPlayerSneaking);
-		if (lastException != null)
-			tooltip.add(lastException.getFormattedText());
-		return lastException != null || added;
-	}
-
 }

src/main/java/com/simibubi/create/content/contraptions/components/structureMovement/bearing/ClockworkContraption.java

@@ -1,21 +1,19 @@
 package com.simibubi.create.content.contraptions.components.structureMovement.bearing;
 
-import java.util.HashSet;
-import java.util.Queue;
-import java.util.Set;
-
-import org.apache.commons.lang3.tuple.Pair;
-
 import com.simibubi.create.content.contraptions.components.structureMovement.AllContraptionTypes;
 import com.simibubi.create.content.contraptions.components.structureMovement.AssemblyException;
 import com.simibubi.create.content.contraptions.components.structureMovement.Contraption;
 import com.simibubi.create.foundation.utility.NBTHelper;
-
 import net.minecraft.nbt.CompoundNBT;
 import net.minecraft.util.Direction;
 import net.minecraft.util.Direction.Axis;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.World;
+import org.apache.commons.lang3.tuple.Pair;
+
+import java.util.HashSet;
+import java.util.Queue;
+import java.util.Set;
 
 public class ClockworkContraption extends Contraption {
 
@@ -88,13 +86,13 @@ public class ClockworkContraption extends Contraption {
 	}
 
 	@Override
-	public boolean searchMovedStructure(World world, BlockPos pos, Direction direction) {
+	public boolean searchMovedStructure(World world, BlockPos pos, Direction direction) throws AssemblyException {
 		return super.searchMovedStructure(world, pos.offset(direction, offset + 1), null);
 	}
 
 	@Override
 	protected boolean moveBlock(World world, Direction direction, Queue<BlockPos> frontier,
-		Set<BlockPos> visited) {
+		Set<BlockPos> visited) throws AssemblyException {
 		if (ignoreBlocks.contains(frontier.peek())) {
 			frontier.poll();
 			return true;

src/main/java/com/simibubi/create/content/contraptions/components/structureMovement/bearing/MechanicalBearingTileEntity.java

@@ -1,13 +1,10 @@
 package com.simibubi.create.content.contraptions.components.structureMovement.bearing;
 
-import static net.minecraft.state.properties.BlockStateProperties.FACING;
-
-import java.util.List;
-
 import com.simibubi.create.content.contraptions.base.GeneratingKineticTileEntity;
 import com.simibubi.create.content.contraptions.components.structureMovement.AbstractContraptionEntity;
 import com.simibubi.create.content.contraptions.components.structureMovement.AssemblyException;
 import com.simibubi.create.content.contraptions.components.structureMovement.ControlledContraptionEntity;
+import com.simibubi.create.content.contraptions.components.structureMovement.IDisplayAssemblyExceptions;
 import com.simibubi.create.foundation.advancement.AllTriggers;
 import com.simibubi.create.foundation.item.TooltipHelper;
 import com.simibubi.create.foundation.tileEntity.TileEntityBehaviour;
@@ -15,7 +12,6 @@ import com.simibubi.create.foundation.tileEntity.behaviour.scrollvalue.ScrollOpt
 import com.simibubi.create.foundation.utility.AngleHelper;
 import com.simibubi.create.foundation.utility.Lang;
 import com.simibubi.create.foundation.utility.ServerSpeedProvider;
-
 import net.minecraft.block.BlockState;
 import net.minecraft.nbt.CompoundNBT;
 import net.minecraft.state.properties.BlockStateProperties;
@@ -25,7 +21,11 @@ import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.math.MathHelper;
 import net.minecraft.util.text.ITextComponent;
 
-public class MechanicalBearingTileEntity extends GeneratingKineticTileEntity implements IBearingTileEntity {
+import java.util.List;
+
+import static net.minecraft.state.properties.BlockStateProperties.FACING;
+
+public class MechanicalBearingTileEntity extends GeneratingKineticTileEntity implements IBearingTileEntity, IDisplayAssemblyExceptions {
 
 	protected ScrollOptionBehaviour<RotationMode> movementMode;
 	protected ControlledContraptionEntity movedContraption;
@@ -33,7 +33,7 @@ public class MechanicalBearingTileEntity extends GeneratingKineticTileEntity imp
 	protected boolean running;
 	protected boolean assembleNextTick;
 	protected float clientAngleDiff;
-	protected ITextComponent lastException;
+	protected AssemblyException lastException;
 
 	public MechanicalBearingTileEntity(TileEntityType<? extends MechanicalBearingTileEntity> type) {
 		super(type);
@@ -66,7 +66,7 @@ public class MechanicalBearingTileEntity extends GeneratingKineticTileEntity imp
 		compound.putBoolean("Running", running);
 		compound.putFloat("Angle", angle);
 		if (lastException != null)
-			compound.putString("LastException", ITextComponent.Serializer.toJson(lastException));
+			compound.putString("LastException", ITextComponent.Serializer.toJson(lastException.component));
 		super.write(compound, clientPacket);
 	}
 
@@ -76,7 +76,7 @@ public class MechanicalBearingTileEntity extends GeneratingKineticTileEntity imp
 		running = compound.getBoolean("Running");
 		angle = compound.getFloat("Angle");
 		if (compound.contains("LastException"))
-			lastException = ITextComponent.Serializer.fromJson(compound.getString("LastException"));
+			lastException = new AssemblyException(ITextComponent.Serializer.fromJson(compound.getString("LastException")));
 		else
 			lastException = null;
 		super.read(compound, clientPacket);
@@ -113,6 +113,11 @@ public class MechanicalBearingTileEntity extends GeneratingKineticTileEntity imp
 		return speed;
 	}
 
+	@Override
+	public AssemblyException getLastAssemblyException() {
+		return lastException;
+	}
+
 	protected boolean isWindmill() {
 		return false;
 	}
@@ -130,11 +135,13 @@ public class MechanicalBearingTileEntity extends GeneratingKineticTileEntity imp
 		Direction direction = getBlockState().get(FACING);
 		BearingContraption contraption = new BearingContraption(isWindmill(), direction);
 		try {
-			lastException = null;
 			if (!contraption.assemble(world, pos))
 				return;
+
+			lastException = null;
 		} catch (AssemblyException e) {
-			lastException = e.message;
+			lastException = e;
+			sendData();
 			return;
 		}
 
@@ -296,12 +303,4 @@ public class MechanicalBearingTileEntity extends GeneratingKineticTileEntity imp
 		TooltipHelper.addHint(tooltip, "hint.empty_bearing");
 		return true;
 	}
-
-	@Override
-	public boolean addToGoggleTooltip(List<String> tooltip, boolean isPlayerSneaking) {
-		boolean added = super.addToGoggleTooltip(tooltip, isPlayerSneaking);
-		if (lastException != null)
-			tooltip.add(lastException.getFormattedText());
-		return lastException != null || added;
-	}
 }

src/main/java/com/simibubi/create/content/contraptions/components/structureMovement/mounted/CartAssemblerBlock.java

@@ -237,11 +237,18 @@ public class CartAssemblerBlock extends AbstractRailBlock
 
 		MountedContraption contraption = new MountedContraption(mode);
 		try {
-			assembler.ifPresent(te -> te.lastException = null);
 			if (!contraption.assemble(world, pos))
 				return;
+
+			assembler.ifPresent(te -> {
+				te.lastException = null;
+				te.sendData();
+			});
 		} catch (AssemblyException e) {
-			assembler.ifPresent(te -> te.lastException = e.message);
+			assembler.ifPresent(te -> {
+				te.lastException = e;
+				te.sendData();
+			});
 			return;
 		}
 

src/main/java/com/simibubi/create/content/contraptions/components/structureMovement/mounted/CartAssemblerTileEntity.java

@@ -1,8 +1,7 @@
 package com.simibubi.create.content.contraptions.components.structureMovement.mounted;
 
-import java.util.List;
+import com.simibubi.create.content.contraptions.components.structureMovement.AssemblyException;
-
+import com.simibubi.create.content.contraptions.components.structureMovement.IDisplayAssemblyExceptions;
-import com.simibubi.create.content.contraptions.goggles.IHaveGoggleInformation;
 import com.simibubi.create.foundation.gui.AllIcons;
 import com.simibubi.create.foundation.tileEntity.SmartTileEntity;
 import com.simibubi.create.foundation.tileEntity.TileEntityBehaviour;
@@ -12,19 +11,21 @@ import com.simibubi.create.foundation.tileEntity.behaviour.scrollvalue.INamedIco
 import com.simibubi.create.foundation.tileEntity.behaviour.scrollvalue.ScrollOptionBehaviour;
 import com.simibubi.create.foundation.utility.Lang;
 import com.simibubi.create.foundation.utility.VecHelper;
-
+import net.minecraft.nbt.CompoundNBT;
 import net.minecraft.state.properties.RailShape;
 import net.minecraft.tileentity.TileEntityType;
 import net.minecraft.util.Direction.Axis;
 import net.minecraft.util.math.Vec3d;
 import net.minecraft.util.text.ITextComponent;
 
-public class CartAssemblerTileEntity extends SmartTileEntity implements IHaveGoggleInformation {
+import java.util.List;
+
+public class CartAssemblerTileEntity extends SmartTileEntity implements IDisplayAssemblyExceptions {
 	private static final int assemblyCooldown = 8;
 
 	protected ScrollOptionBehaviour<CartMovementMode> movementMode;
 	private int ticksSinceMinecartUpdate;
-	protected ITextComponent lastException; //TODO
+	protected AssemblyException lastException;
 
 	public CartAssemblerTileEntity(TileEntityType<? extends CartAssemblerTileEntity> type) {
 		super(type);
@@ -47,6 +48,27 @@ public class CartAssemblerTileEntity extends SmartTileEntity implements IHaveGog
 		behaviours.add(movementMode);
 	}
 
+	@Override
+	public void write(CompoundNBT compound, boolean clientPacket) {
+		if (lastException != null)
+			compound.putString("LastException", ITextComponent.Serializer.toJson(lastException.component));
+		super.write(compound, clientPacket);
+	}
+
+	@Override
+	protected void read(CompoundNBT compound, boolean clientPacket) {
+		if (compound.contains("LastException"))
+			lastException = new AssemblyException(ITextComponent.Serializer.fromJson(compound.getString("LastException")));
+		else
+			lastException = null;
+		super.read(compound, clientPacket);
+	}
+
+	@Override
+	public AssemblyException getLastAssemblyException() {
+		return lastException;
+	}
+
 	protected ValueBoxTransform getMovementModeSlot() {
 		return new CartAssemblerValueBoxTransform();
 	}
@@ -106,11 +128,4 @@ public class CartAssemblerTileEntity extends SmartTileEntity implements IHaveGog
 	public boolean isMinecartUpdateValid() {
 		return ticksSinceMinecartUpdate >= assemblyCooldown;
 	}
-
-	@Override
-	public boolean addToGoggleTooltip(List<String> tooltip, boolean isPlayerSneaking) {
-		if (lastException != null)
-			tooltip.add(lastException.getFormattedText());
-		return lastException != null;
-	}
 }

src/main/java/com/simibubi/create/content/contraptions/components/structureMovement/piston/LinearActuatorTileEntity.java

@@ -1,18 +1,12 @@
 package com.simibubi.create.content.contraptions.components.structureMovement.piston;
 
-import java.util.List;
-
 import com.simibubi.create.content.contraptions.base.KineticTileEntity;
-import com.simibubi.create.content.contraptions.components.structureMovement.AbstractContraptionEntity;
+import com.simibubi.create.content.contraptions.components.structureMovement.*;
-import com.simibubi.create.content.contraptions.components.structureMovement.AssemblyException;
-import com.simibubi.create.content.contraptions.components.structureMovement.ControlledContraptionEntity;
-import com.simibubi.create.content.contraptions.components.structureMovement.IControlContraption;
 import com.simibubi.create.foundation.tileEntity.TileEntityBehaviour;
 import com.simibubi.create.foundation.tileEntity.behaviour.ValueBoxTransform;
 import com.simibubi.create.foundation.tileEntity.behaviour.scrollvalue.ScrollOptionBehaviour;
 import com.simibubi.create.foundation.utility.Lang;
 import com.simibubi.create.foundation.utility.ServerSpeedProvider;
-
 import net.minecraft.nbt.CompoundNBT;
 import net.minecraft.tileentity.TileEntityType;
 import net.minecraft.util.math.BlockPos;
@@ -20,7 +14,9 @@ import net.minecraft.util.math.MathHelper;
 import net.minecraft.util.math.Vec3d;
 import net.minecraft.util.text.ITextComponent;
 
-public abstract class LinearActuatorTileEntity extends KineticTileEntity implements IControlContraption {
+import java.util.List;
+
+public abstract class LinearActuatorTileEntity extends KineticTileEntity implements IControlContraption, IDisplayAssemblyExceptions {
 
 	public float offset;
 	public boolean running;
@@ -29,7 +25,7 @@ public abstract class LinearActuatorTileEntity extends KineticTileEntity impleme
 	protected boolean forceMove;
 	protected ScrollOptionBehaviour<MovementMode> movementMode;
 	protected boolean waitingForSpeedChange;
-	protected ITextComponent lastException;
+	protected AssemblyException lastException;
 
 	// Custom position sync
 	protected float clientOffsetDiff;
@@ -87,8 +83,9 @@ public abstract class LinearActuatorTileEntity extends KineticTileEntity impleme
 						assemble();
 						lastException = null;
 					} catch (AssemblyException e) {
-						lastException = e.message;
+						lastException = e;
 					}
+				sendData();
 			}
 			return;
 		}
@@ -162,7 +159,7 @@ public abstract class LinearActuatorTileEntity extends KineticTileEntity impleme
 		compound.putBoolean("Waiting", waitingForSpeedChange);
 		compound.putFloat("Offset", offset);
 		if (lastException != null)
-			compound.putString("LastException", ITextComponent.Serializer.toJson(lastException));
+			compound.putString("LastException", ITextComponent.Serializer.toJson(lastException.component));
 		super.write(compound, clientPacket);
 		
 		if (clientPacket && forceMove) {
@@ -180,7 +177,7 @@ public abstract class LinearActuatorTileEntity extends KineticTileEntity impleme
 		waitingForSpeedChange = compound.getBoolean("Waiting");
 		offset = compound.getFloat("Offset");
 		if (compound.contains("LastException"))
-			lastException = ITextComponent.Serializer.fromJson(compound.getString("LastException"));
+			lastException = new AssemblyException(ITextComponent.Serializer.fromJson(compound.getString("LastException")));
 		else
 			lastException = null;
 		super.read(compound, clientPacket);
@@ -197,6 +194,11 @@ public abstract class LinearActuatorTileEntity extends KineticTileEntity impleme
 			movedContraption = null;
 	}
 
+	@Override
+	public AssemblyException getLastAssemblyException() {
+		return lastException;
+	}
+
 	public abstract void disassemble();
 
 	protected abstract void assemble() throws AssemblyException;
@@ -302,13 +304,4 @@ public abstract class LinearActuatorTileEntity extends KineticTileEntity impleme
 	public BlockPos getBlockPosition() {
 		return pos;
 	}
-
-	@Override
-	public boolean addToGoggleTooltip(List<String> tooltip, boolean isPlayerSneaking) {
-		boolean added = super.addToGoggleTooltip(tooltip, isPlayerSneaking);
-		if (lastException != null)
-			tooltip.add(lastException.getFormattedText());
-		return lastException != null || added;
-	}
-
 }

src/main/java/com/simibubi/create/content/contraptions/components/structureMovement/piston/PistonContraption.java

@@ -68,7 +68,7 @@ public class PistonContraption extends TranslatingContraption {
 		return true;
 	}
 
-	private boolean collectExtensions(World world, BlockPos pos, Direction direction) {
+	private boolean collectExtensions(World world, BlockPos pos, Direction direction) throws AssemblyException {
 		List<BlockInfo> poles = new ArrayList<>();
 		BlockPos actualStart = pos;
 		BlockState nextBlock = world.getBlockState(actualStart.offset(direction));
@@ -91,7 +91,7 @@ public class PistonContraption extends TranslatingContraption {
 
 				nextBlock = world.getBlockState(actualStart.offset(direction));
 				if (extensionsInFront > MechanicalPistonBlock.maxAllowedPistonPoles())
-					throw new AssemblyException("tooManyPistonPoles");
+					throw AssemblyException.tooManyPistonPoles();
 			}
 		}
 
@@ -114,7 +114,7 @@ public class PistonContraption extends TranslatingContraption {
 			nextBlock = world.getBlockState(end.offset(direction.getOpposite()));
 
 			if (extensionsInFront + extensionsInBack > MechanicalPistonBlock.maxAllowedPistonPoles())
-				throw new AssemblyException("tooManyPistonPoles");
+				throw AssemblyException.tooManyPistonPoles();
 		}
 
 		anchor = pos.offset(direction, initialExtensionProgress + 1);
@@ -126,7 +126,7 @@ public class PistonContraption extends TranslatingContraption {
 						1, 1);
 
 		if (extensionLength == 0)
-			throw new AssemblyException("noPistonPoles");
+			throw AssemblyException.noPistonPoles();
 
 		bounds = new AxisAlignedBB(0, 0, 0, 0, 0, 0);
 
@@ -146,7 +146,7 @@ public class PistonContraption extends TranslatingContraption {
 	}
 
 	@Override
-	protected boolean addToInitialFrontier(World world, BlockPos pos, Direction direction, Queue<BlockPos> frontier) {
+	protected boolean addToInitialFrontier(World world, BlockPos pos, Direction direction, Queue<BlockPos> frontier) throws AssemblyException {
 		frontier.clear();
 		boolean sticky = isStickyPiston(world.getBlockState(pos.offset(orientation, -1)));
 		boolean retracting = direction != orientation;
@@ -159,7 +159,7 @@ public class PistonContraption extends TranslatingContraption {
 			if (retracting && World.isOutsideBuildHeight(currentPos))
 				return true;
 			if (!world.isBlockPresent(currentPos))
-				throw new AssemblyException("chunkNotLoaded");
+				throw AssemblyException.unloadedChunk(currentPos);
 			BlockState state = world.getBlockState(currentPos);
 			if (!BlockMovementTraits.movementNecessary(state, world, currentPos))
 				return true;

src/main/java/com/simibubi/create/content/contraptions/components/structureMovement/pulley/PulleyTileEntity.java

@@ -9,7 +9,6 @@ import com.simibubi.create.content.contraptions.components.structureMovement.pis
 import com.simibubi.create.foundation.config.AllConfigs;
 import com.simibubi.create.foundation.tileEntity.behaviour.CenteredSideValueBoxTransform;
 import com.simibubi.create.foundation.tileEntity.behaviour.ValueBoxTransform;
-
 import net.minecraft.block.BlockState;
 import net.minecraft.block.Blocks;
 import net.minecraft.block.IWaterLoggable;
@@ -192,7 +191,7 @@ public class PulleyTileEntity extends LinearActuatorTileEntity {
 	protected void read(CompoundNBT compound, boolean clientPacket) {
 		initialOffset = compound.getInt("InitialOffset");
 		if (compound.contains("LastException"))
-			lastException = ITextComponent.Serializer.fromJson(compound.getString("LastException"));
+			lastException = new AssemblyException(ITextComponent.Serializer.fromJson(compound.getString("LastException")));
 		else
 			lastException = null;
 		super.read(compound, clientPacket);
@@ -202,7 +201,7 @@ public class PulleyTileEntity extends LinearActuatorTileEntity {
 	public void write(CompoundNBT compound, boolean clientPacket) {
 		compound.putInt("InitialOffset", initialOffset);
 		if (lastException != null)
-			compound.putString("LastException", ITextComponent.Serializer.toJson(lastException));
+			compound.putString("LastException", ITextComponent.Serializer.toJson(lastException.component));
 		super.write(compound, clientPacket);
 	}
 

src/main/java/com/simibubi/create/content/contraptions/goggles/GoggleOverlayRenderer.java

@@ -4,6 +4,7 @@ import com.mojang.blaze3d.systems.RenderSystem;
 import com.simibubi.create.AllBlocks;
 import com.simibubi.create.AllItems;
 import com.simibubi.create.CreateClient;
+import com.simibubi.create.content.contraptions.components.structureMovement.IDisplayAssemblyExceptions;
 import com.simibubi.create.content.contraptions.components.structureMovement.piston.MechanicalPistonBlock;
 import com.simibubi.create.content.contraptions.components.structureMovement.piston.PistonExtensionPoleBlock;
 import com.simibubi.create.foundation.config.AllConfigs;
@@ -92,6 +93,14 @@ public class GoggleOverlayRenderer {
 				tooltip.remove(tooltip.size() - 1);
 		}
 
+		if (te instanceof IDisplayAssemblyExceptions) {
+			boolean exceptionAdded = ((IDisplayAssemblyExceptions) te).addExceptionToTooltip(tooltip);
+			if (exceptionAdded) {
+				hasHoveringInformation = true;
+				hoverAddedInformation = true;
+			}
+		}
+
 		// break early if goggle or hover returned false when present
 		if ((hasGoggleInformation && !goggleAddedInformation) && (hasHoveringInformation && !hoverAddedInformation))
 			return;

src/main/java/com/simibubi/create/content/contraptions/goggles/IHaveGoggleInformation.java

@@ -9,13 +9,13 @@ import java.util.List;
 public interface IHaveGoggleInformation {
 
 	DecimalFormat decimalFormat = new DecimalFormat("#.##");
-	public static String spacing = "    ";
+	String spacing = "    ";
 
 	/**
 	* this method will be called when looking at a TileEntity that implemented this interface
 	 *
-	 * @return {{@code true}} if the tooltip creation was successful and should be displayed,
+	 * @return {@code true} if the tooltip creation was successful and should be displayed,
-	 * or {{@code false}} if the overlay should not be displayed
+	 * or {@code false} if the overlay should not be displayed
 	* */
 	default boolean addToGoggleTooltip(List<String> tooltip, boolean isPlayerSneaking){
 		return false;

src/main/resources/assets/create/lang/default/messages.json

@@ -172,6 +172,13 @@
 	"create.gui.goggles.at_current_speed": "at current speed",
 	"create.gui.goggles.pole_length": "Pole Length:",
 
+	"create.gui.assembly.exception": "This Contraption was unable to assemble:",
+	"create.gui.assembly.exception.unmovableBlock": "Unmovable Block (%4$s) at [%1$s %2$s %3$s]",
+	"create.gui.assembly.exception.chunkNotLoaded": "The Block at [%1$s %2$s %3$s] was not in a loaded chunk",
+	"create.gui.assembly.exception.structureTooLarge": "There are too many Blocks included in the contraption.\nThe configured maximum is: %1$s",
+	"create.gui.assembly.exception.tooManyPistonPoles": "There are too many extension Poles attached to this Piston.\nThe configured maximum is: %1$s",
+	"create.gui.assembly.exception.noPistonPoles": "The Piston is missing some extension Poles",
+
 	"create.gui.gauge.info_header": "Gauge Information:",
 	"create.gui.speedometer.title": "Rotation Speed",
 	"create.gui.stressometer.title": "Network Stress",