cudahashcat 0.14 ERROR: cuMemcpyDtoH() 999

Hi all,

With regards to the following error:

ERROR: cuMemcpyDtoH() 999

Is it because of the multiple rules that I was using or the dictionary?

Rules.Type.....: File (rules\best64.rule), File (rules\combinator.rule), File (rules\passwordspro.rule)

I saw http://hashcat.net/forum/thread-1991.htm...MemcpyDtoH but not sure if it's relevant. I am aware of version 0.15 but just curious to see what triggered this error. Thanks!