I can't figure out why it keeps failing on Ripper. As soon as I start the Ripper process, it stops. I even cloned a blu ray for an ISO. Tried to rip the ISO file, same result. I use the same settings for ripping on DVDFab 12. And it works on the 12. Hope I can get some answers. 
mustangdmg
We need more info to check this one. 
Did you try different profiles? Or different source? 
Please provide the DVDFab13.log file and the fabcheck_internal.log file. Thank you.