Is there a size limit for the input file for hcstatgen?

I ran it fine on rockyou.txt, but when I tried it on a wordlist that was several gigs, it seemed to choke.  In taskmanager, it is sitting at 0% cpu usage, 0.5 meg of memory, and no disk usage.  It has been this way for quite a while.

Is there any advantage to using a very large wordlist over a shorter one?  Just curious.  What wordlist do you recommend I use?

Thank you.