Jack Richard

Thanks so much for your help! I removed the log4j dependency, I honesty don't remember when I put that there. Once I fixed the jar.finalizedBy line, everything worked! (One small issue where I was relocating all of "com.google" when I just should've relocated "com.google.common," too) Thanks again!

I have multiple shadowed dependencies in my mod, and it seems that something isn't working correctly here... When I look in the jar file, all of my dependencies are properly relocated and included, but I seem to have an issue with Minecraft recognizing it as a mod. The error says Very strange. The debug.log shows the mod failed to load because of a Here's my build.gradle if that will be any help. buildscript { repositories { maven { url = 'https://files.minecraftforge.net/maven' } maven { url = "https://plugins.gradle.org/m2/" } jcenter() mavenCentral() } dependencies { classpath group: 'net.minecraftforge.gradle', name: 'ForgeGradle', version: '3.+', changing: true } } plugins { id "com.github.johnrengelman.shadow" version "2.0.4" } apply plugin: 'java' apply plugin: 'net.minecraftforge.gradle' apply plugin: 'eclipse' apply plugin: 'maven-publish' version = '1.0' group = 'com.mod.mod' // http://maven.apache.org/guides/mini/guide-naming-conventions.html archivesBaseName = 'mod' sourceCompatibility = targetCompatibility = compileJava.sourceCompatibility = compileJava.targetCompatibility = '1.8' // Need this here so eclipse task generates correctly. //Print out JVM information so that we know what version is running. Extreamly useful for people to know when helping you. println('Java: ' + System.getProperty('java.version') + ' JVM: ' + System.getProperty('java.vm.version') + '(' + System.getProperty('java.vendor') + ') Arch: ' + System.getProperty('os.arch')) minecraft { // The mappings can be changed at any time, and must be in the following format. // snapshot_YYYYMMDD Snapshot are built nightly. // stable_# Stables are built at the discretion of the MCP team. // Use non-default mappings at your own risk. they may not always work. // Simply re-run your setup task after changing the mappings to update your workspace. mappings channel: 'snapshot', version: '20200514-1.15.1' // makeObfSourceJar = false // an Srg named sources jar is made by default. uncomment this to disable. // accessTransformer = file('src/main/resources/META-INF/accesstransformer.cfg') // Default run configurations. // These can be tweaked, removed, or duplicated as needed. runs { client { workingDirectory project.file('run') // Recommended logging data for a userdev environment property 'forge.logging.markers', 'SCAN,REGISTRIES,REGISTRYDUMP' // Recommended logging level for the console property 'forge.logging.console.level', 'debug' mods { examplemod { source sourceSets.main } } } server { workingDirectory project.file('run') // Recommended logging data for a userdev environment property 'forge.logging.markers', 'SCAN,REGISTRIES,REGISTRYDUMP' // Recommended logging level for the console property 'forge.logging.console.level', 'debug' mods { examplemod { source sourceSets.main } } } data { workingDirectory project.file('run') // Recommended logging data for a userdev environment property 'forge.logging.markers', 'SCAN,REGISTRIES,REGISTRYDUMP' // Recommended logging level for the console property 'forge.logging.console.level', 'debug' args '--mod', 'examplemod', '--all', '--output', file('src/generated/resources/') mods { examplemod { source sourceSets.main } } } } } project.tasks.build.dependsOn project.tasks.shadowJar repositories { jcenter() } configurations { provided compile.extendsFrom provided } dependencies { minecraft 'net.minecraftforge:forge:1.15.2-31.2.36' compile group: 'org.apache.logging.log4j', name: 'log4j-api', version: '2.11.2' compile group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.11.2' compile group: 'org.seleniumhq.selenium', name: 'selenium-java', version: '3.141.59' shadow group: 'org.apache.logging.log4j', name: 'log4j-api', version: '2.11.2' shadow group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.11.2' shadow group: 'org.seleniumhq.selenium', name: 'selenium-java', version: '3.141.59' } shadowJar { configurations = [project.configurations.shadow] classifier '' relocate('org.apache', 'com.mod.apache') relocate('com.google', 'com.mod.google') } processResources { inputs.property "version", project.version inputs.property "mcversion", "1.15.2-31.2.36" from(sourceSets.main.resources.srcDirs) { include 'mcmod.info' expand 'version':project.version, 'mcversion': "1.15.2-31.2.36" } from(sourceSets.main.resources.srcDirs) { exclude 'mcmod.info' } } jar { manifest { attributes([ "Specification-Title": "mod", "Specification-Vendor": "mod", "Specification-Version": "1", // We are version 1 of ourselves "Implementation-Title": project.name, "Implementation-Version": "${version}", "Implementation-Vendor" :"mod", "Multi-Release": 'true', "Implementation-Timestamp": new Date().format("yyyy-MM-dd'T'HH:mm:ssZ"), "ContainedDeps": "byte-buddy-1.8.15.jar client-combined-3.141.59.jar commons-exec-1.3.jar guava-25.0-jre.jar okhttp-3.11.0.jar okio-1.14.0.jar" ]) } } // Example configuration to allow publishing using the maven-publish task // This is the preferred method to reobfuscate your jar file jar.finalizedBy('reobfJar') // However if you are in a multi-project build, dev time needs unobfed jar files, so you can delay the obfuscation until publishing by doing //publish.dependsOn('reobfJar') publishing { publications { mavenJava(MavenPublication) { artifact jar } } repositories { maven { url "file:///${project.projectDir}/mcmodsrepo" } } } My guess is that it is an error with the "minecraft" dependancy, I just don't know where to start on fixing it. Thanks in advance!

But now that I've entered the game, I've noticed a fatal flaw. None of my block or items registered. I think it's because of ignoring the Minecraft dependencies, so I'll need to keep on working.

I changed my shadowJar config to this: shadowJar { relocate('com.google', 'org.(modid).google') configurations = [project.configurations.shadow] classifier '' relocate('org.apache', 'org.(modid).apache') } And I have success!

I used this to get the libraries back: shadow group: 'org.apache.logging.log4j', name: 'log4j-api', version: '2.11.2' shadow group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.11.2' But now I'm getting this: java.lang.NoSuchMethodError: com.google.common.util.concurrent.SimpleTimeLimiter.create(Ljava/util/concurrent/ExecutorService;)Lcom/google/common/util/concurrent/SimpleTimeLimiter;

Now we're getting somewhere... here's my build.gradle: configurations { provided compile.extendsFrom provided } dependencies { minecraft 'net.minecraftforge:forge:1.15.2-31.2.36' shadow group: 'org.seleniumhq.selenium', name:'selenium-java', version:'3.141.59' } shadowJar { configurations = [project.configurations.shadow] classifier '' relocate('org.apache', 'org.(modid).apache') } processResources { inputs.property "version", project.version inputs.property "mcversion", "1.15.2-31.2.36" from(sourceSets.main.resources.srcDirs) { include 'mcmod.info' expand 'version':project.version, 'mcversion': "1.15.2-31.2.36" } from(sourceSets.main.resources.srcDirs) { exclude 'mcmod.info' } } project.tasks.build.dependsOn shadowJar The file size drastically shrinks, and Minecraft recognizes it as a mod! But now, I'm getting: java.lang.NoClassDefFoundError: org/(modid)/apache/logging/log4j/LogManager So there might be more work to do...

I've relocated the Apache libraries now, but it's still not recognizing. When I recompile the jar, it appears that it has additionally copied all of Minecraft Forge's files. I think Shadow is picking up the: minecraft 'net.minecraftforge:forge:1.15.2-31.2.36' in dependencies{}... I can't get exclude to work on this dependency, and I think this may be the solution.

It runs fine with runClient, but when it's built, it's not recognized at all.

All my libraries are inside the jar now, but Minecraft does not recognize it as a mod anymore...

At this point, I've reimplemented the Shadow plugin, but it makes no changes to the jar unless I use: project.tasks.build.dependsOn shadowJar which makes a much larger jar, and I assume my dependencies are somewhere in there, but Minecraft does not recognize it as a mod. When I used the dependencies{} block in the shadowJar{} block, and included my dependencies, it would generate a 1 KB jar, which is definitely not right at all. Other than including the plugin, here's the code that Shadow effects: dependencies { minecraft 'net.minecraftforge:forge:1.15.2-31.2.36' compile group: 'org.seleniumhq.selenium', name:'selenium-java', version:'3.141.59' } shadowJar { relocate 'org.apache.commons.exec', 'org.(modid).apache.commons.exec' classifier '' } Thanks all for your help.

I'm guessing I still need to move the Apache library somehow, because I always get NoClassDefFoundError when calling it... If you still aren't allowed to use Apache libraries (I read old forum posts saying you can't include those normally), I guess that would explain the error. I couldn't figure out the Shadow plugin, it didn't seem to include any dependencies, so I used that guide, I'll try again with Shadow. Thanks.

I'm trying to use this guide now. Forge doesn't seem to have srgExtra or extraLines anymore, is there an alternative?

Is it just crossed out, or not allowing the game to run? If you're using IntelliJ or Eclipse, you'll see a line through a class or method name if it's deprecated. It shouldn't crash the game because of that.

I changed it to use the plugins{} block instead. shade wasn't a valid option, so I stuck with shadow. But I see some examples just using compile, does that work anyway? Okay, here's my shadowJar{} block I added: shadowJar { relocate 'org.apache', 'org.(modid).apache' } I'm still getting NoClassDefFoundError, though. Thanks for your help so far.

I looked into shadowing, and I added the plugin to my Gradle file. Before, I was "shading" using this: configurations.shade.each { dep -> from(project.zipTree(dep)){ exclude 'META-INF', 'META-INF/**' } } ...but I'm guessing that isn't the same thing. I needed to use version 4.0.4, because 6.0 didn't support the version of Gradle I'm using. When I build the jar, the logs show a NoClassDefFoundError for the main package of the dependency. All I've added to build.gradle is: buildscript { repositories { maven { url = 'https://files.minecraftforge.net/maven' } maven { url = "https://plugins.gradle.org/m2/" } jcenter() mavenCentral() } dependencies { classpath group: 'net.minecraftforge.gradle', name: 'ForgeGradle', version: '3.+', changing: true classpath "com.github.jengelman.gradle.plugins:shadow:4.0.4" } } apply plugin: 'net.minecraftforge.gradle' apply plugin: 'eclipse' apply plugin: 'maven-publish' apply plugin: "com.github.johnrengelman.shadow" dependencies { minecraft 'net.minecraftforge:forge:1.15.2-31.2.36' shadow 'nameofdependency' } Maybe there is more configuration needed?

I'm using version 1.15.2, and I'm trying to include Apache Commons Exec in my mod. From what I've read, you can't use it like a normal dependency. But, the Apache library is a prerequisite for the dependency I am adding, so I don't think I can simply relocate it. How can I use this? Thanks in advance.

Got it, and got it. Thanks for explaining it to me, I'll try to wrap my head around that, and send an update soon. Thank you!

I know, it's very confusing, and frankly, I might just rework the GUI if I can't get this to work, anyway. Is it possible to get data from the Screen class to the TileEntity class? Also, should I implement IForgeContainerType in my Container class? I understand, the original theory was a little far-fetched. So an empty client container could be it? Just trying to understand. Thanks again.

I understand that IInventory is not accepted, so I'll be working to fix that soon. No problem, I'm just happy with whatever you're able to contribute. Yeah, that wasn't the best choice. I guess so. I was a little confused once functions like getUpdatePacket() and onDataPacket() were used. I'm sending the data every tick, the button writes the data to an item in the one slot of the GUI. Here's the code for the .sendtoServer() handler: public static void handle(CarrierServerSync msg, Supplier<NetworkEvent.Context> ctx) { ctx.get().enqueueWork(() -> { PlayerEntity sender = ctx.get().getSender(); ServerTileEntity server = getTileEntity(sender.inventory, msg.tileEntity); server.setCarrierName(msg.data); }); ctx.get().setPacketHandled(true); } private static ServerTileEntity getTileEntity(final PlayerInventory playerInventory, final BlockPos tileEntity) { Objects.requireNonNull(playerInventory, "playerInventory cannot be null"); final TileEntity tileAtPos = playerInventory.player.world.getTileEntity(tileEntity); if (tileAtPos instanceof ServerTileEntity) { return (ServerTileEntity) tileAtPos; } throw new IllegalStateException("Tile entity is not correct! " + tileAtPos); } This is probably not the best way to do this... Luckily, I do have my container, messages, and tile entity registered. Looping back to my original theory, is Block#createTileEntity() run when you open a GUI? Thanks again.

public class ServerContainer extends Container { public ServerTileEntity entity; public ServerContainer(final int windowId, final PlayerInventory playerInventory, final PacketBuffer data) { this(windowId, playerInventory, getTileEntity(playerInventory, data)); } public ServerContainer(final int windowId, final PlayerInventory playerInventory, final TileEntity tileEntity) { super(ContainerTypes.SERVER.get(), windowId); this.entity = (ServerTileEntity) tileEntity; int startX = 8; int startY = 84; int slotSizePlus2 = 18; for (int row = 0; row < 3; ++row) { for (int column = 0; column < 9; ++column) { this.addSlot(new Slot(playerInventory, 9 + (row * 9) + column, startX + (column * slotSizePlus2), startY + (row * slotSizePlus2))); } } int hotbarY = 142; for (int column = 0; column < 9; ++column) { this.addSlot(new Slot(playerInventory, column, startX + (column * slotSizePlus2), hotbarY)); } this.addSlot(new CustomSlot(entity, 0, 7, 35)); } @Override public ItemStack transferStackInSlot(PlayerEntity playerIn, int index) { ItemStack itemstack = ItemStack.EMPTY; Slot slot = this.inventorySlots.get(index); if (slot != null && slot.getHasStack()) { ItemStack itemstack1 = slot.getStack(); itemstack = itemstack1.copy(); if (index < 36) { if (!this.mergeItemStack(itemstack1, 36, this.inventorySlots.size(), true)) { return ItemStack.EMPTY; } } else if (!this.mergeItemStack(itemstack1, 0, 36, false)) { return ItemStack.EMPTY; } if (itemstack1.isEmpty()) { slot.putStack(ItemStack.EMPTY); } else { slot.onSlotChanged(); } } return itemstack; } @Override public boolean canInteractWith(PlayerEntity playerIn) { return true; } private static ServerTileEntity getTileEntity(final PlayerInventory playerInventory, final PacketBuffer data) { Objects.requireNonNull(playerInventory, "playerInventory cannot be null"); Objects.requireNonNull(data, "data cannot be null"); final TileEntity tileAtPos = playerInventory.player.world.getTileEntity(data.readBlockPos()); if (tileAtPos instanceof ServerTileEntity) { return (ServerTileEntity) tileAtPos; } throw new IllegalStateException("Tile entity is not correct! " + tileAtPos); } } @OnlyIn(Dist.CLIENT) public class ServerScreen extends ContainerScreen<ServerContainer> { private static final ResourceLocation TEXTURES = new ResourceLocation("modid:textures/gui/server.png"); private final PlayerInventory player; private ServerTileEntity entity; private TextFieldWidget carrierName; public ServerScreen(ServerContainer container, PlayerInventory player, ITextComponent title) { super(container, player, title); this.player = player; this.entity = getTileEntity(player, container); this.guiLeft = 0; this.guiTop = 0; this.xSize = 176; this.ySize = 166; } @Override protected void init() { super.init(); int x = (this.width - this.xSize) / 2; int y = (this.height - this.ySize) / 2; this.carrierName = new TextFieldWidget(font, x + 84, y + 11, 86, 18, "Carrier Name"); this.carrierName.setMaxStringLength(13); this.carrierName.setEnableBackgroundDrawing(false); this.carrierName.setVisible(true); this.carrierName.setTextColor(16777215); this.carrierName.setText(this.entity.getCarrierName()); System.out.println(this.entity.getCarrierName()); System.out.println("Above set"); } private static ServerTileEntity getTileEntity(final PlayerInventory playerInventory, final ServerContainer container) { Objects.requireNonNull(playerInventory, "playerInventory cannot be null"); final TileEntity tileAtPos = playerInventory.player.world.getTileEntity(container.entity.getPos()); if (tileAtPos instanceof ServerTileEntity) { return (ServerTileEntity) tileAtPos; } throw new IllegalStateException("Tile entity is not correct! " + tileAtPos); } @Override public void render(final int mouseX, final int mouseY, final float partialTicks) { this.renderBackground(); this.carrierName.render(mouseX, mouseY, partialTicks); super.render(mouseX, mouseY, partialTicks); this.renderHoveredToolTip(mouseX, mouseY); } @Override public boolean mouseClicked(double p_mouseClicked_1_, double p_mouseClicked_3_, int p_mouseClicked_5_) { this.carrierName.mouseClicked(p_mouseClicked_1_, p_mouseClicked_3_, p_mouseClicked_5_); return super.mouseClicked(p_mouseClicked_1_, p_mouseClicked_3_, p_mouseClicked_5_); } @Override protected void drawGuiContainerBackgroundLayer(float partialTicks, int mouseX, int mouseY) { RenderSystem.color4f(1.0f, 1.0f, 1.0f, 1.0f); this.getMinecraft().getTextureManager().bindTexture(TEXTURES); int x = (this.width - this.xSize) / 2; int y = (this.height - this.ySize) / 2; this.blit(x, y, 0, 0, 176, 166); this.font.drawString("Server", x + 10, y + 10, 16777215); this.entity.setCarrierName(carrierName.getText()); ModClass.INSTANCE.sendToServer(new CarrierServerSync(carrierName.getText(), this.entity.getPos())); } @Override protected void drawGuiContainerForegroundLayer(int mouseX, int mouseY) { super.drawGuiContainerForegroundLayer(mouseX, mouseY); int x = (this.width - this.xSize) / 2; int y = (this.height - this.ySize) / 2; this.addButton(new Button(x + 30, y + 33, 50, 20, "Register", new Button.IPressable() { @Override public void onPress(Button p_onPress_1_) { System.out.println("pressed"); if (!entity.getStackInSlot(0).isEmpty()) { System.out.println("not empty"); if (entity.getStackInSlot(0).getStack().getTag() != null) { System.out.println("not null"); CompoundNBT compoundNBT = entity.getStackInSlot(0).getTag().copy(); compoundNBT.putString("carrier", carrierName.getText()); entity.getStackInSlot(0).setTag(compoundNBT); } else { System.out.println("null"); CompoundNBT compoundNBT = new CompoundNBT(); compoundNBT.putString("carrier", carrierName.getText()); entity.getStackInSlot(0).getStack().setTag(compoundNBT); } } } })); this.addButton(carrierName); } } public class ServerTileEntity extends TileEntity implements INamedContainerProvider, ITickableTileEntity, IInventory { private NonNullList<ItemStack> inventory = NonNullList.<ItemStack>withSize(1, ItemStack.EMPTY); private IItemHandlerModifiable items = createHandler(); private LazyOptional<IItemHandlerModifiable> itemHandler = LazyOptional.of(() -> items); private String carrierName = ""; public ServerTileEntity(TileEntityType<?> tileEntityTypeIn) { super(tileEntityTypeIn); } public ServerTileEntity(){ super(TileEntityTypes.SERVER.get()); } @Override public ITextComponent getDisplayName() { return new TranslationTextComponent("container.server"); } @Override public Container createMenu(int p_createMenu_1_, PlayerInventory p_createMenu_2_, PlayerEntity p_createMenu_3_) { return new ServerContainer(p_createMenu_1_, p_createMenu_2_, this); } @Override public void tick() { } @Override public SUpdateTileEntityPacket getUpdatePacket() { CompoundNBT tagCompound = new CompoundNBT(); tagCompound.putString("carrier", carrierName); this.write(tagCompound); SUpdateTileEntityPacket pack = new SUpdateTileEntityPacket(pos, 0, tagCompound); return pack; } @Override public void onDataPacket(NetworkManager net, SUpdateTileEntityPacket pkt) { this.read(pkt.getNbtCompound()); } @Override public CompoundNBT getUpdateTag() { CompoundNBT tagCompound = new CompoundNBT(); tagCompound.putString("carrier", carrierName); return tagCompound; } @Override public void handleUpdateTag(CompoundNBT tag) { this.read(tag); } public void setCarrierName(String carrierName) { this.carrierName = carrierName; } public String getCarrierName() { return this.carrierName; } @Override public int getSizeInventory() { return inventory.size(); } @Override public boolean isEmpty() { for(ItemStack stack : this.inventory) { if(!stack.isEmpty()) return false; } return true; } @Override public ItemStack getStackInSlot(int index) { return inventory.get(index); } @Override public ItemStack decrStackSize(int index, int count) { return ItemStackHelper.getAndSplit(this.inventory, index, count); } @Override public void setInventorySlotContents(int index, ItemStack stack) { this.inventory.set(index, stack); } @Override public ItemStack removeStackFromSlot(int index) { return ItemStackHelper.getAndRemove(this.inventory, index); } @Override public boolean isUsableByPlayer(PlayerEntity player) { return true; } @Override public void clear() { this.inventory.clear(); } @Override public <T> LazyOptional<T> getCapability(@Nonnull Capability<T> cap, @Nonnull Direction side) { if (cap == CapabilityItemHandler.ITEM_HANDLER_CAPABILITY) { return itemHandler.cast(); } return super.getCapability(cap, side); } @Override public void read(CompoundNBT compound) { super.read(compound); this.inventory = NonNullList.<ItemStack>withSize(this.getSizeInventory(), ItemStack.EMPTY); ItemStackHelper.loadAllItems(compound, this.inventory); setCarrierName(compound.getString("carrier")); } private IItemHandlerModifiable createHandler() { return new InvWrapper(this); } @Override public CompoundNBT write(CompoundNBT compound) { super.write(compound); ItemStackHelper.saveAllItems(compound, this.inventory); compound.putString("carrier", getCarrierName()); return compound; } } public class Server extends Block { private static final VoxelShape SHAPE = Block.makeCuboidShape(0.0D, 0.0D, 0.0D, 16.0D, 32.0D, 16.0D); public static final DirectionProperty FACING = HorizontalBlock.HORIZONTAL_FACING; public Server(Properties properties) { super(properties); this.setDefaultState(this.getStateContainer().getBaseState().with(FACING, Direction.NORTH)); } @Override public TileEntity createTileEntity(BlockState state, IBlockReader world) { return TileEntityTypes.SERVER.get().create(); } @Override public boolean hasTileEntity(BlockState state) { return true; } @Override protected void fillStateContainer(StateContainer.Builder<Block, BlockState> builder) { builder.add(FACING); } @Override public BlockState getStateForPlacement(BlockItemUseContext context) { return this.getDefaultState().with(FACING, context.getPlacementHorizontalFacing().getOpposite()); } @Override public VoxelShape getShape(BlockState state, IBlockReader worldIn, BlockPos pos, ISelectionContext context) { return SHAPE; } @Override public ActionResultType onBlockActivated(BlockState state, World worldIn, BlockPos pos, PlayerEntity player, Hand handIn, BlockRayTraceResult hit) { TileEntity te = worldIn.getTileEntity(pos); if (te != null && te instanceof ServerTileEntity && !worldIn.isRemote) { NetworkHooks.openGui((ServerPlayerEntity) player, (ServerTileEntity) te, pos); } return super.onBlockActivated(state, worldIn, pos, player, handIn, hit); } } My goal is to get the data from the TextFieldWidget, and save it in NBT tags, and be able to retreive it later, putting the text back in the field. Yes, I know; most of this code won't be the "recommended way" of doing any of this, I've been really trying though. Let me know if you need any more information. Thanks.

I forgot to mention I send Messages from the client to the server, so I am doing some syncing, I believe.

Does it help to say when I add... @Override public void tick() { System.out.println(variable); } ...I always get the result, whether or not world.isRemote()? I use... @Override public CompoundNBT getUpdateTag() { CompoundNBT tagCompound = new CompoundNBT(); tagCompound.putString("variable", variable); return tagCompound; } @Override public void handleUpdateTag(CompoundNBT tag) { this.read(tag); } @Override public void read(CompoundNBT compound) { super.read(compound); this.inventory = NonNullList.<ItemStack>withSize(this.getSizeInventory(), ItemStack.EMPTY); ItemStackHelper.loadAllItems(compound, this.inventory); setVariable(compound.getString("variable")); } @Override public CompoundNBT write(CompoundNBT compound) { super.write(compound); ItemStackHelper.saveAllItems(compound, this.inventory); compound.putString("variable", getVariable()); return compound; } to synchronize the data. Thanks.

Yes, the data is stored and read through read() and write()

I've been able to make it work now, using the NBT tags in the Item class, I'm able to pass the ItemStack to the screen. Thanks!

Hi, I'm having trouble with opening my GUI, as the tile entity (extending ITickableTileEntity, among others) will erase all stored variables, retrieved from NBT. So this isn't a problem with NBT. Also, this is a 1.15 problem. I've tracked down the exact time that the variables reset, and it's when the GUI's screen is opened, createTileEntity() is triggered in the Block class, recreating the tile entity and overwriting the variables. Is there a way to stop this? Here's a snippet from my block's class. @Override public TileEntity createTileEntity(BlockState state, IBlockReader world) { return TileEntityTypes.TILE.get().create(); } @Override public boolean hasTileEntity(BlockState state) { return true; } Thanks for your help in advance, I'd be willing to send more code snippets and answer any questions.