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java.lang.NullPointerException: Ticking block entity at sonar.calculator.mod.common.tileentity.machines.TileEntityAssimilator$Algorithm.harvestBlock(TileEntityAssimilator.java:257) at sonar.calculator.mod.common.tileentity.machines.TileEntityAssimilator.func_73660_a(TileEntityAssimilator.java:61) at net.minecraft.world.World.func_72939_s(World.java:1797) at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:618) at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:707) at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:611) at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:148) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:469) at java.lang.Thread.run(Thread.java:745)