Hashcat 3.0 CL_UNKNOWN_ERROR

[MsChievous]

Ooh, well that is most likely where the issue lies then. Have you installed the OpenCL drivers for your CPU? If you have, could you try this and see if that works:

./hashcat64.bin -b -m 0 -D 2

The -D 2 parameter tells hashcat to use CPU only.