No digests loaded error

[p03ws]

I'm trying to crack a MySQL hash(using my GPU), I have a batfile containing this:
oclHashcat64.exe -m 300 hash.txt ?l?l?l?l ?l?s?u?d cracked.txt
pause
But when I try to run it, I get ERROR: no digests loaded.
I'm Dutch and can't find a good translation for digests so my question is, what am I doing wrong? and what does no digests loaded mean?

Thanks for reading this.