tomschmidt

This mod will be an addon to an existing mod, which only exists in 1.16.5 so updating is completely useless and I need a solution for this version. If I update it to get an answer I have to backport it which not sounds like a solution.

My whole entity class: package net.tomschmidt.drones.entity; import net.tomschmidt.drones.register.ModEntityTypes; import net.minecraft.entity.Entity; import net.minecraft.entity.EntityType; import net.minecraft.entity.LivingEntity; import net.minecraft.entity.ai.attributes.Attribute; import net.minecraft.entity.ai.attributes.AttributeModifierMap; import net.minecraft.entity.ai.attributes.Attributes; import net.minecraft.inventory.EquipmentSlotType; import net.minecraft.item.ItemStack; import net.minecraft.nbt.CompoundNBT; import net.minecraft.network.IPacket; import net.minecraft.util.HandSide; import net.minecraft.util.math.MathHelper; import net.minecraft.util.math.vector.Vector3d; import net.minecraft.world.World; public class DroneEntity extends LivingEntity { public DroneEntity(EntityType<? extends DroneEntity> p_i48580_1_, World p_i48580_2_) { super(p_i48580_1_, p_i48580_2_); } public void setStartPos(double x, double y, double z) { this.setPos(x, y, z); this.setDeltaMovement(Vector3d.ZERO); this.xo = x; this.yo = y; this.zo = z; } @Override protected void defineSynchedData() { } @Override public Iterable<ItemStack> getArmorSlots() { return null; } @Override public ItemStack getItemBySlot(EquipmentSlotType p_184582_1_) { return null; } @Override public void setItemSlot(EquipmentSlotType p_184201_1_, ItemStack p_184201_2_) { } @Override public HandSide getMainArm() { return HandSide.RIGHT; } @Override public IPacket<?> getAddEntityPacket() { return null; } public static AttributeModifierMap.MutableAttribute setCustomAttributes() { return LivingEntity.createLivingAttributes() .add(Attributes.MAX_HEALTH, 20.0f); } }

I tried to add an custom Entity into Minecraft, but i get this error: [16:48:36] [Server thread/FATAL] [minecraft/ThreadTaskExecutor]: Error executing task on Server java.lang.NullPointerException: null at net.minecraft.network.datasync.EntityDataManager.set(EntityDataManager.java:122) ~[forge:?] {re:classloading} at net.minecraft.entity.LivingEntity.setHealth(LivingEntity.java:924) ~[forge:?] {re:classloading} at net.minecraft.entity.LivingEntity.<init>(LivingEntity.java:207) ~[forge:?] {re:classloading} at net.tomschmidt.drones.entity.DroneEntity.<init>(DroneEntity.java:23) ~[?:?] {re:classloading} at net.tomschmidt.drones.items.DroneSpawnItem.onItemUseFirst(DroneItem.java:35) ~[?:?] {re:classloading} at net.minecraft.item.ItemStack.lambda$onItemUseFirst$6(ItemStack.java:191) ~[forge:?] {re:classloading,xf:fml:forge:filled_map.4,xf:fml:forge:itemstack} at net.minecraft.item.ItemStack.onItemUse(ItemStack.java:202) ~[forge:?] {re:classloading,xf:fml:forge:filled_map.4,xf:fml:forge:itemstack} at net.minecraft.item.ItemStack.onItemUseFirst(ItemStack.java:191) ~[forge:?] {re:classloading,xf:fml:forge:filled_map.4,xf:fml:forge:itemstack} at net.minecraft.server.management.PlayerInteractionManager.useItemOn(PlayerInteractionManager.java:331) ~[forge:?] {re:classloading} at net.minecraft.network.play.ServerPlayNetHandler.handleUseItemOn(ServerPlayNetHandler.java:958) ~[forge:?] {re:classloading} at net.minecraft.network.play.client.CPlayerTryUseItemOnBlockPacket.handle(CPlayerTryUseItemOnBlockPacket.java:36) ~[forge:?] {re:classloading} at net.minecraft.network.play.client.CPlayerTryUseItemOnBlockPacket.handle(CPlayerTryUseItemOnBlockPacket.java:12) ~[forge:?] {re:classloading} at net.minecraft.network.PacketThreadUtil.lambda$ensureRunningOnSameThread$0(PacketThreadUtil.java:19) ~[forge:?] {re:classloading} at net.minecraft.util.concurrent.TickDelayedTask.run(TickDelayedTask.java:17) ~[forge:?] {re:classloading} at net.minecraft.util.concurrent.ThreadTaskExecutor.doRunTask(ThreadTaskExecutor.java:136) ~[forge:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.util.concurrent.RecursiveEventLoop.doRunTask(RecursiveEventLoop.java:22) ~[forge:?] {re:classloading} at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:734) ~[forge:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:159) ~[forge:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.util.concurrent.ThreadTaskExecutor.pollTask(ThreadTaskExecutor.java:109) ~[forge:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.server.MinecraftServer.pollTaskInternal(MinecraftServer.java:717) ~[forge:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:711) ~[forge:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.util.concurrent.ThreadTaskExecutor.managedBlock(ThreadTaskExecutor.java:119) ~[forge:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.server.MinecraftServer.waitUntilNextTick(MinecraftServer.java:697) ~[forge:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:646) ~[forge:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:232) ~[forge:?] {re:classloading,pl:accesstransformer:B} at java.lang.Thread.run(Thread.java:750) [?:1.8.0_342] {} (I try to spawn my Entity with an extra Item but the same happens with the summon command) Other people in this forum had similiar errors, but they could fix it with public static AttributeModifierMap.MutableAttribute setCustomAttributes() { return LivingEntity.createLivingAttributes() .add(Attributes.MAX_HEALTH, 20.0f); } and @Mod.EventBusSubscriber(modid = Drones.MOD_ID, bus = Mod.EventBusSubscriber.Bus.MOD) public class ModEventBusEvents { @SubscribeEvent public static void addEntityAttributes(EntityAttributeCreationEvent event) { CombatDrones.LOGGER.info("ID22, EntityAttributeCreationEvent"); //is executed (shows in log) event.put(ModEntityTypes.DRONE.get(), DroneEntity.setCustomAttributes().build()); CombatDrones.LOGGER.info("HasSupplier: " + GlobalEntityTypeAttributes.hasSupplier(ModEntityTypes.DRONE.get())); //returns true } } But i already did this and that confuses me. Does anyone know the solution for my problem? PS: excuse my typos, i am not an native english speaker.