Game crashing when i use forge 1.12

[Yoshi]

Hi, Every time i want to play on any forge version (for example this log is for 1.12 forge) It usually crashes after i load up the game on the loading screen.


 

[spoiler---- Minecraft Crash Report ----

WARNING: coremods are present:
Contact their authors BEFORE contacting forge

// Who set us up the TNT?

Time: 7/7/20 8:47 PM
Description: Initializing game

java.lang.NullPointerException: Initializing game
    at net.minecraftforge.fml.common.versioning.ComparableVersion.parseVersion(ComparableVersion.java:371)
    at net.minecraftforge.fml.common.versioning.ComparableVersion.<init>(ComparableVersion.java:362)
    at net.minecraftforge.fml.common.versioning.DefaultArtifactVersion.<init>(DefaultArtifactVersion.java:31)
    at net.minecraftforge.fml.common.versioning.DefaultArtifactVersion.<init>(DefaultArtifactVersion.java:42)
    at net.minecraftforge.fml.common.FMLModContainer.getProcessedVersion(FMLModContainer.java:628)
    at net.minecraftforge.fml.common.Loader.sortModList(Loader.java:235)
    at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:547)
    at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:227)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:466)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:377)
    at net.minecraft.client.main.Main.main(SourceFile:123)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)


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

-- Head --
Thread: Client thread
Stacktrace:
    at net.minecraftforge.fml.common.versioning.ComparableVersion.parseVersion(ComparableVersion.java:371)
    at net.minecraftforge.fml.common.versioning.ComparableVersion.<init>(ComparableVersion.java:362)
    at net.minecraftforge.fml.common.versioning.DefaultArtifactVersion.<init>(DefaultArtifactVersion.java:31)
    at net.minecraftforge.fml.common.versioning.DefaultArtifactVersion.<init>(DefaultArtifactVersion.java:42)
    at net.minecraftforge.fml.common.FMLModContainer.getProcessedVersion(FMLModContainer.java:628)
    at net.minecraftforge.fml.common.Loader.sortModList(Loader.java:235)
    at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:547)
    at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:227)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:466)

-- Initialization --
Details:
Stacktrace:
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:377)
    at net.minecraft.client.main.Main.main(SourceFile:123)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
    Minecraft Version: 1.12
    Operating System: Windows 10 (amd64) version 10.0
    Java Version: 1.8.0_51, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 552553176 bytes (526 MB) / 771751936 bytes (736 MB) up to 2147483648 bytes (2048 MB)
    JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: MCP 9.40 Powered by Forge 14.21.1.2443 8 mods loaded, 8 mods active
    States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
    U    minecraft{1.12} [Minecraft] (minecraft.jar) 
    U    mcp{9.19} [Minecraft Coder Pack] (minecraft.jar) 
    U    FML{8.0.99.99} [Forge Mod Loader] (forge-1.12-14.21.1.2443.jar) 
    U    forge{14.21.1.2443} [Minecraft Forge] (forge-1.12-14.21.1.2443.jar) 
    U    mercurius_updater{1.0} [mercurius_updater] (MercuriusUpdater-1.12.jar) 
    U    customnpcs{1.12} [CustomNPCs] (CustomNPCs_1.12.2-(05Jul20).jar) 
    U    props{null} [Decocraft] (Decocraft-2.6.3_1.12.2.jar) 
    U    llibrary{1.7.19} [LLibrary] (llibrary-1.7.19-1.12.2.jar) 
    Loaded coremods (and transformers): 
    GL info: ' Vendor: 'ATI Technologies Inc.' Version: '4.6.13587 Compatibility Profile Context 20.4.2 26.20.15029.27017' Renderer: 'AMD Radeon R9 200 Series'
    Launched Version: 1.12-forge1.12-14.21.1.2443
    LWJGL: 2.9.4
    OpenGL: AMD Radeon R9 200 Series GL version 4.6.13587 Compatibility Profile Context 20.4.2 26.20.15029.27017, ATI Technologies Inc.
    GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

    Using VBOs: Yes
    Is Modded: Definitely; Client brand changed to 'fml,forge'
    Type: Client (map_client.txt)
    Resource Packs: 
    Current Language: English (US)
    Profiler Position: N/A (disabled)
    CPU: 8x AMD FX(tm)-8120 Eight-Core Processor]

Can someone also explain how to use spoilers?

Edited July 7, 2020 by Yoshi

[Cyborgmas]

1.12 is not supported, if you are receiving this error on a supported version (1.16 for instance) post that log instead

[Yoshi]

This is for 1.15.2

---- Minecraft Crash Report ----
// I let you down. Sorry :(

Time: 07/07/20 21:20
Description: Unexpected error

java.lang.NoClassDefFoundError: team/creative/creativecore/common/network/CreativePacket
	at team.creative.cmdcam.client.CamEventHandlerClient.setupMouseHandlerBefore(CamEventHandlerClient.java:231) ~[?:?] {re:classloading}
	at net.minecraft.client.renderer.GameRenderer.func_78473_a(GameRenderer.java) ~[?:?] {re:classloading,pl:accesstransformer:B,xf:fml:cmdcam:changeMouseOver,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1337) ~[?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.func_195542_b(Minecraft.java:904) [?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:553) [?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.main.Main.main(SourceFile:204) [?:?] {re:classloading}
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51] {}
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_51] {}
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_51] {}
	at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_51] {}
	at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:51) [forge-1.15.2-31.2.31.jar:31.2] {}
	at net.minecraftforge.fml.loading.FMLClientLaunchProvider$$Lambda$407/1293252487.call(Unknown Source) [forge-1.15.2-31.2.31.jar:31.2] {}
	at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-5.1.0.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-5.1.0.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-5.1.0.jar:?] {}
	at cpw.mods.modlauncher.Launcher.run(Launcher.java:81) [modlauncher-5.1.0.jar:?] {}
	at cpw.mods.modlauncher.Launcher.main(Launcher.java:65) [modlauncher-5.1.0.jar:?] {}
Caused by: java.lang.ClassNotFoundException: team.creative.creativecore.common.network.CreativePacket
	at java.lang.ClassLoader.findClass(ClassLoader.java:530) ~[?:1.8.0_51] {}
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_51] {}
	at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:101) ~[modlauncher-5.1.0.jar:?] {}
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_51] {}
	... 17 more


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

-- System Details --
Details:
	Minecraft Version: 1.15.2
	Minecraft Version ID: 1.15.2
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 1.8.0_51, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 1503540056 bytes (1433 MB) / 2147483648 bytes (2048 MB) up to 2147483648 bytes (2048 MB)
	CPUs: 8
	JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
	ModLauncher: 5.1.0+69+master.79f13f7
	ModLauncher launch target: fmlclient
	ModLauncher naming: srg
	ModLauncher services: 
		/eventbus-2.2.0-service.jar eventbus PLUGINSERVICE 
		/forge-1.15.2-31.2.31.jar object_holder_definalize PLUGINSERVICE 
		/forge-1.15.2-31.2.31.jar runtime_enum_extender PLUGINSERVICE 
		/accesstransformers-2.1.3-shadowed.jar accesstransformer PLUGINSERVICE 
		/forge-1.15.2-31.2.31.jar capability_inject_definalize PLUGINSERVICE 
		/forge-1.15.2-31.2.31.jar runtimedistcleaner PLUGINSERVICE 
		/forge-1.15.2-31.2.31.jar fml TRANSFORMATIONSERVICE 
	FML: 31.2
	Forge: net.minecraftforge:31.2.31
	FML Language Providers: 
		javafml@31.2
		minecraft@1
	Mod List: 
		forge-1.15.2-31.2.31-client.jar Minecraft {minecraft@1.15.2 NONE}
		forge-1.15.2-31.2.31-universal.jar Forge {forge@31.2.31 NONE}
		CMDCam_v1.5.15_mc1.15.2.jar CMDCam {cmdcam@1.5.0 NONE}
		MorePlayerModels_1.14.4-(24Jun20).jar More Player Models {moreplayermodels@(24Jun20) NONE}
	Launched Version: 1.15.2-forge-31.2.31
	Backend library: LWJGL version 3.2.2 build 10
	Backend API: AMD Radeon R9 200 Series GL version 4.6.13587 Compatibility Profile Context 20.4.2 26.20.15029.27017, ATI Technologies Inc.
	GL Caps: Using framebuffer using OpenGL 3.0
	Using VBOs: Yes
	Is Modded: Definitely; Client brand changed to 'forge'
	Type: Client (map_client.txt)
	Resource Packs: 
	Current Language: ~~ERROR~~ NullPointerException: null
	CPU: 8x AMD FX(tm)-8120 Eight-Core Processor 

 

[DaemonUmbra]

That's a completely different crash caused by you not installing the dependency for one of your mods, also you have a 1.14.4 mod in 1.15.2