MadMikeGamerXL1 Posted October 15, 2014 Share Posted October 15, 2014 I tried to launch my modpack recently, and noticed that it was crashing, as it couldn't even show the Minecraft window. It would just close the launcher, starts loading in the Console, but then re-opens the launcher again. I tried removing recently added mods, to soon find out it wasn't even my pack doing it, it was any and every modpack. I found this Error after reading the console. [B#439] 2014-10-15 18:18:20 [INFO] [TCon-Preloader] Loaded properties successfully. Using specified settings. [B#439] 2014-10-15 18:18:20 [INFO] [ForgeModLoader] Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker [B#439] 2014-10-15 18:18:20 [INFO] [ForgeModLoader] Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker [B#439] 2014-10-15 18:18:20 [INFO] [ForgeModLoader] Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker [B#439] 2014-10-15 18:18:20 [SEVERE] [ForgeModLoader] Unable to launch [B#439] java.util.ConcurrentModificationException [B#439] at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901) [B#439] at java.util.ArrayList$Itr.remove(ArrayList.java:865) [B#439] at net.minecraft.launchwrapper.Launch.launch(Launch.java:114) [B#439] at net.minecraft.launchwrapper.Launch.main(Launch.java:27) [B#439] Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=128m; support was removed in 8.0 I did have Java 8, but read that it doesn't work well with Technic, and so i uninstalled it, so i was left with Java 7 Update 67 (64-Bit). But this still did not fix the issue. Link to comment Share on other sites More sharing options...
EvilOwl Posted October 15, 2014 Share Posted October 15, 2014 (edited) Your log says you are still running 1.8 (the last line - specifically the MaxPermSize flag which was dropped in 1.8) Edited October 15, 2014 by bochen415 Link to comment Share on other sites More sharing options...
MadMikeGamerXL1 Posted October 15, 2014 Author Share Posted October 15, 2014 Your log says you are still running 1.8 (the last line - specifically the MaxPermSize flag which was dropped in 1.8) That's really odd.... In my Add/remove programs, it says Java 7 Update 67 (64-bit). Any idea why? Link to comment Share on other sites More sharing options...
EvilOwl Posted October 15, 2014 Share Posted October 15, 2014 Yo did not uninstall it properly. Go to C:Program FilesJava (on a Windows system) and check for yourself. Link to comment Share on other sites More sharing options...
MadMikeGamerXL1 Posted October 15, 2014 Author Share Posted October 15, 2014 Yo did not uninstall it properly. Go to C:Program FilesJava (on a Windows system) and check for yourself. Thanks for the reply. I checked that destination, and it did have a folder for 8, but there was only one file in there, called "msvcr100.dll". I deleted the folder, and still doesn't work. could it be the JDK? I think that's Java 8, too. Link to comment Share on other sites More sharing options...
EvilOwl Posted October 15, 2014 Share Posted October 15, 2014 Yes it can. JDK ships a JRE with it. Psssst: there's a fix for the java 8 problems but this wasn't tested enough..... One of the Forge devs twitted it... Link MadMikeGamerXL1 1 Link to comment Share on other sites More sharing options...
MadMikeGamerXL1 Posted October 16, 2014 Author Share Posted October 16, 2014 Yes it can. JDK ships a JRE with it. Psssst: there's a fix for the java 8 problems but this wasn't tested enough..... One of the Forge devs twitted it... Link Thanks so much for the help, uninstalling JDK 8 and installing 7 worked perfectly! Link to comment Share on other sites More sharing options...
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