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hey, it was weird, i was trying to make a bukkit server and had to reinstall the new java 1.8.0_25 to make it work. I try to open Minecraft and it works fine unmodded, but I reinstall forge and click "play" mineraft loads, but then just closes !



This is what it says in the Game Output when I set it to the launcher to not close after pressing "Play":



[17:27:42] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[17:27:42] [main/INFO] [LaunchWrapper]: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[17:27:42] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker
[17:27:42] [main/INFO] [FML]: Forge Mod Loader version 7.10.25.1208 for Minecraft 1.7.10 loading
[17:27:42] [main/INFO] [FML]: Java is Java HotSpot(TM) Client VM, version 1.8.0_25, running on Windows 8:x86:6.2, installed at C:\Program Files (x86)\Java\jre1.8.0_25
[17:27:42] [main/INFO] [FML]: Loading tweaker shadersmodcore.loading.SMCTweaker from GLSL-Shaders-Mod-non-Forge-1.7.10.jar
[17:27:42] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
[17:27:42] [main/INFO] [LaunchWrapper]: Loading tweak class name shadersmodcore.loading.SMCTweaker
[17:27:42] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker
[17:27:42] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
[17:27:42] [main/ERROR] [LaunchWrapper]: Unable to launch
java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(Unknown Source) ~[?:1.8.0_25]
at java.util.ArrayList$Itr.remove(Unknown Source) ~[?:1.8.0_25]
at net.minecraft.launchwrapper.Launch.launch(Launch.java:117) [launchwrapper-1.9.jar:?]
at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.9.jar:?]
Java HotSpot(TM) Client VM warning: Using incremental CMS is deprecated and will likely be removed in a future release

You are using Java 8 with an forge version below build 1230.

Either downgrade Java or get the Forge patch (coremod file) for 1.6.4 (at time).

ok cool thanks I'm getting Java 7 now and see if it works
awesome it worked! Thank you!