I created a tag as described in the forge doc,

when I try to check whether a block is included in this tag, I get an error

this is my tag

this is my Tag Class

and that's the block class  in which I use the tag

 

and that's the error i get:

[16:05:47] [Render thread/INFO] [STDOUT/]: [net.minecraft.util.registry.Bootstrap:printToSYSOUT:130]: ---- Minecraft Crash Report ----
// Surprise! Haha. Well, this is awkward.

Time: 09.03.21, 16:05
Description: Unexpected error

java.lang.NullPointerException: Cannot invoke "net.minecraft.tags.ITag.contains(Object)" because the return value of "net.minecraft.tags.ITagCollection.get(net.minecraft.util.ResourceLocation)" is null
	at net.luis.industry.api.blocks.PipeBlock.updatePostPlacement(PipeBlock.java:79) ~[main/:?] {re:classloading}
	at net.minecraft.block.AbstractBlock$AbstractBlockState.updatePostPlacement(AbstractBlock.java:749) ~[forge-1.16.5-36.0.46_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading}
	at net.minecraft.block.AbstractBlock$AbstractBlockState.updateNeighbours(AbstractBlock.java:684) ~[forge-1.16.5-36.0.46_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading}
	at net.minecraft.world.World.markAndNotifyBlock(World.java:274) ~[forge-1.16.5-36.0.46_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.world.World.setBlockState(World.java:241) ~[forge-1.16.5-36.0.46_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.world.World.setBlockState(World.java:205) ~[forge-1.16.5-36.0.46_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraftforge.common.extensions.IForgeBlock.removedByPlayer(IForgeBlock.java:200) ~[forge-1.16.5-36.0.46_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading}
	at net.minecraftforge.common.extensions.IForgeBlockState.removedByPlayer(IForgeBlockState.java:157) ~[forge-1.16.5-36.0.46_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading}
	at net.minecraft.client.multiplayer.PlayerController.onPlayerDestroyBlock(PlayerController.java:118) ~[forge-1.16.5-36.0.46_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.multiplayer.PlayerController.clickBlock(PlayerController.java:143) ~[forge-1.16.5-36.0.46_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.clickMouse(Minecraft.java:1349) ~[forge-1.16.5-36.0.46_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.processKeyBinds(Minecraft.java:1688) ~[forge-1.16.5-36.0.46_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.runTick(Minecraft.java:1507) ~[forge-1.16.5-36.0.46_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:979) ~[forge-1.16.5-36.0.46_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.run(Minecraft.java:612) ~[forge-1.16.5-36.0.46_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.main.Main.main(Main.java:184) ~[forge-1.16.5-36.0.46_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?] {}
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64) ~[?:?] {}
	at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?] {}
	at java.lang.reflect.Method.invoke(Method.java:564) ~[?:?] {}
	at net.minecraftforge.userdev.FMLUserdevClientLaunchProvider.lambda$launchService$0(FMLUserdevClientLaunchProvider.java:52) ~[forge-1.16.5-36.0.46_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.0.9.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.0.9.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.0.9.jar:?] {}
	at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.0.9.jar:?] {}
	at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.9.jar:?] {}
	at net.minecraftforge.userdev.LaunchTesting.main(LaunchTesting.java:105) [forge-1.16.5-36.0.46_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {}


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Thread: Render thread
Stacktrace:
	at net.luis.industry.api.blocks.PipeBlock.updatePostPlacement(PipeBlock.java:79) ~[?:?] {re:classloading}
	at net.minecraft.block.AbstractBlock$AbstractBlockState.updatePostPlacement(AbstractBlock.java:749) ~[forge:?] {re:classloading}
	at net.minecraft.block.AbstractBlock$AbstractBlockState.updateNeighbours(AbstractBlock.java:684) ~[forge:?] {re:classloading}
	at net.minecraft.world.World.markAndNotifyBlock(World.java:274) ~[forge:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.world.World.setBlockState(World.java:241) ~[forge:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.world.World.setBlockState(World.java:205) ~[forge:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraftforge.common.extensions.IForgeBlock.removedByPlayer(IForgeBlock.java:200) ~[forge:?] {re:classloading}
	at net.minecraftforge.common.extensions.IForgeBlockState.removedByPlayer(IForgeBlockState.java:157) ~[forge:?] {re:classloading}
	at net.minecraft.client.multiplayer.PlayerController.onPlayerDestroyBlock(PlayerController.java:118) ~[forge:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.multiplayer.PlayerController.clickBlock(PlayerController.java:143) ~[forge:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.clickMouse(Minecraft.java:1349) ~[forge:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.processKeyBinds(Minecraft.java:1688) ~[forge:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
-- Affected level --
Details:
	All players: 1 total; [ClientPlayerEntity['Dev'/233, l='ClientLevel', x=-60.09, y=67.00, z=3.87]]
	Chunk stats: Client Chunk Cache: 841, 529
	Level dimension: minecraft:overworld
	Level spawn location: World: (-48,68,18), Chunk: (at 0,4,2 in -3,1; contains blocks -48,0,16 to -33,255,31), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 4504 game time, 4504 day time
	Server brand: forge
	Server type: Integrated singleplayer server
Stacktrace:
	at net.minecraft.client.world.ClientWorld.fillCrashReport(ClientWorld.java:465) ~[forge-1.16.5-36.0.46_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.addGraphicsAndWorldToCrashReport(Minecraft.java:2091) ~[forge-1.16.5-36.0.46_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.run(Minecraft.java:633) ~[forge-1.16.5-36.0.46_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.main.Main.main(Main.java:184) ~[forge-1.16.5-36.0.46_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?] {}
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64) ~[?:?] {}
	at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?] {}
	at java.lang.reflect.Method.invoke(Method.java:564) ~[?:?] {}
	at net.minecraftforge.userdev.FMLUserdevClientLaunchProvider.lambda$launchService$0(FMLUserdevClientLaunchProvider.java:52) ~[forge-1.16.5-36.0.46_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.0.9.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.0.9.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.0.9.jar:?] {}
	at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.0.9.jar:?] {}
	at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.9.jar:?] {}
	at net.minecraftforge.userdev.LaunchTesting.main(LaunchTesting.java:105) [forge-1.16.5-36.0.46_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {}

 

Edited March 9, 20214 yr by Luis_ST

I'm not sure if it's necessary to put .json in your TagClass. But since I'm not an exepert on modding, Idk if removing it will work. So therefore, I suggest that you take a look in my Tags Class, I made it a bit different but it works.

I hope I could help you ^^

public static final ResourceLocation FLUID_SYSTEM = new ResourceLocation(Industry.MOD_ID, "tags/blocks/fluid_system.json");

I think you do not need to specify the whole path here

Edited March 9, 20214 yr by Beethoven92

8 hours ago, Beethoven92 said:

I think you do not need to specify the whole path here

You're right, minecraft only needs the name of the file and not the complete path