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 ----------