Ripping problem

I have some files (DVD not Blue Rays) I’m trying to rip with BD ripper. It will rip part of the file; stall; then indicate that the file conversion is complete.

I tried cleaning the disk, changing file types; no joy

I can play the entire file with a DVD player.

Is there any other trick for a “sticky” file?

I just bought the blu-ray ripper today and so far I have not had a problem with it. I’m using it on Windows 7 64-bit pro.