andrewthegreatx

Yep, found a mod in the 1.12.2 folder called "Ida-0.1.3-corePlugin" so that must've been it. Everything is working fine now even with the mods. Thank you for getting this fixed for me an thank you for giving me your time today. Have a good rest of your day!!

No i got the device mod from curseforge. This one right?: https://minecraft.curseforge.com/projects/mrcrayfishs-device-mod

There was a mod inside the 1.12.2 folder. And without any mods, forge loaded up regularly. No crashes

It has to be. Unless there is a hidden mod somewhere my mods folder is empty.

[18:11:16] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker [18:11:16] [main/INFO] [LaunchWrapper]: Using primary tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker [18:11:16] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLTweaker [18:11:17] [main/INFO] [FML]: Forge Mod Loader version 14.23.4.2728 for Minecraft 1.12.2 loading [18:11:17] [main/INFO] [FML]: Java is Java HotSpot(TM) 64-Bit Server VM, version 1.8.0_51, running on Windows 10:amd64:10.0, installed at C:\Program Files (x86)\Minecraft\runtime\jre-x64\1.8.0_51 [18:11:17] [main/INFO] [FML]: Searching C:\Users\andre\AppData\Roaming\.minecraft\mods for mods [18:11:17] [main/INFO] [FML]: Searching C:\Users\andre\AppData\Roaming\.minecraft\mods\1.12.2 for mods [18:11:17] [main/WARN] [FML]: Found FMLCorePluginContainsFMLMod marker in LibrarianLib-1.12.jar. This is not recommended, @Mods should be in a separate jar from the coremod. [18:11:17] [main/WARN] [FML]: The coremod com.teamwizardry.librarianlib.asm.LibLibCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft [18:11:17] [main/WARN] [FML]: The coremod LibrarianLib Plugin (com.teamwizardry.librarianlib.asm.LibLibCorePlugin) is not signed! [18:11:17] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker [18:11:17] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLDeobfTweaker [18:11:17] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker [18:11:17] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker [18:11:17] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper [18:11:19] [main/INFO] [FML]: Found valid fingerprint for Minecraft Forge. Certificate fingerprint e3c3d50c7c986df74c645c0ac54639741c90a557 [18:11:20] [main/INFO] [FML]: Found valid fingerprint for Minecraft. Certificate fingerprint cd99959656f753dc28d863b46769f7f8fbaefcfc [18:11:20] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper [18:11:20] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper [18:11:20] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: java.lang.NoClassDefFoundError: com/mrcrayfish/device/api/app/IIcon [18:11:20] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at io.github.lukas2005.DeviceModApps.coremod.ClassTransformer.<clinit>(ClassTransformer.java:45) [18:11:20] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) [18:11:20] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) [18:11:20] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) [18:11:20] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.lang.reflect.Constructor.newInstance(Constructor.java:422) [18:11:20] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.lang.Class.newInstance(Class.java:442) [18:11:20] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.<init>(ASMTransformerWrapper.java:243) [18:11:20] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at $wrapper.io.github.lukas2005.DeviceModApps.coremod.ClassTransformer.<init>(Unknown Source) [18:11:20] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) [18:11:20] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) [18:11:20] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) [18:11:20] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.lang.reflect.Constructor.newInstance(Constructor.java:422) [18:11:20] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.lang.Class.newInstance(Class.java:442) [18:11:20] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraft.launchwrapper.LaunchClassLoader.registerTransformer(LaunchClassLoader.java:88) [18:11:20] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:131) [18:11:20] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraft.launchwrapper.Launch.launch(Launch.java:115) [18:11:20] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [18:11:20] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]: Caused by: java.lang.ClassNotFoundException: com.mrcrayfish.device.api.app.IIcon [18:11:20] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]: at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) [18:11:20] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]: at java.lang.ClassLoader.loadClass(ClassLoader.java:424) [18:11:20] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]: at java.lang.ClassLoader.loadClass(ClassLoader.java:357) [18:11:20] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]: ... 17 more [18:11:20] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:643]: Caused by: java.lang.NullPointerException [18:11:20] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:643]: at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182) [18:11:20] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:643]: ... 19 more This is it with no mods, just forge

Alright browser extension is downloaded. what do i do now? Because it still crashes without any mods with it on forge.

minecraft.curseforge.com and 9minecraft.net

I've already had furniture mod in there. And his device mod is the second one in the mod list.

Even after installing that mod it is still crashing. And also even without any mods installed it is still crashing.

I've been having trouble with the latest forge lately. It worked fine an hour ago, after installing some more mods it kept on crashing. I removed each one and it still crashed. even re-installing forge it still crashed and also with no mods in it. in the game output, theres 27 warnings. all having something to do with hash or size whatever that means.Heres the game output: