levishous Posted October 19, 2013 Share Posted October 19, 2013 Please help me! I keep getting the following error report when i try to launch tekkit classic. If anyone knows a solution please tell me! java.lang.IllegalArgumentException: Slot 255 is already occupied by mffs.BlockForceField@161a226 when adding mffs.BlockForceField@dcac12 at pb.<init>(Block.java:251) at pb.<init>(Block.java:284) at agy.<init>(BlockContainer.java:13) at mffs.BlockForceField.<init>(BlockForceField.java:30) at mffs.mod_ModularForceFieldSystem.load(mod_ModularForceFieldSystem.java:115) at cpw.mods.fml.common.modloader.ModLoaderModContainer.init(ModLoaderModContainer.java:356) at cpw.mods.fml.common.Loader.modInit(Loader.java:273) at cpw.mods.fml.common.Loader.initializeMods(Loader.java:628) at cpw.mods.fml.client.FMLClientHandler.onLoadComplete(FMLClientHandler.java:223) at net.minecraft.client.Minecraft.a(Minecraft.java:429) at net.minecraft.client.Minecraft.run(Minecraft.java:738) at java.lang.Thread.run(Unknown Source) --- END ERROR REPORT cd239208 ---------- Link to comment Share on other sites More sharing options...
muddiless Posted October 21, 2013 Share Posted October 21, 2013 It's a config error. Some other mods block Id is messing with modular forcefields. Try using id resolver or delete muffs or the mod causing the problem. Did you download any extra mods? Link to comment Share on other sites More sharing options...
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