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  1. K

    Problem NullPointerException

    A few days ago... 2013-07-04 19:06:46 [SEVERE] Encountered an unexpected exception IllegalArgumentException java.lang.IllegalArgumentException: Slot 248 is already occupied by ic2.core.block.BlockTex@4c5a8ac6 when adding So I changed it (Tin ore, item belonging to slot 248) to 948 as a test...