November 24, 2015 at 7:11 PM Official Post #2 Code reactor = ((ic2.core.block.reactor.tileentity.TileEntityReactorChamberElectric)ItemCard55Reactor.getReactor(worldObj, x, y, z)).getReactor(); From the source, guessing something changed in IC2 at some point. You'll probably want to post it here though: [Addon] Nuclear Control 2