Invalid argument

[itanon]

@rico is right - you've got a stray hyphen (or if your filename actually begins with a dash, you'll need to rename it)

And I'm sorry to be the bearer of sad news, but your other question is right - only cards supported by the vendor are supported by hashcat.

But hey, that means it's upgrade time! You can get a used GTX 970 on eBay for US$150 (or less) right now.

Thanks Royce you've been helpful and very kind, hope to see you again in some other thread.....So my hashcat experience ends here for the moment.
Thanks again!