I have had the same problem with Cosmos Disc 3.
If I copy the features separately, everything is fine.
If I use whole disc copy, the program crashes at near 90%.
The other 6 discs copied without error.
I tried making the destination size 7 gigs just to see if it was a file that caused the crash, it finished without error.
If I try to make it smaller than 6.8 gigs, it crashes.
I doesn't make any difference which ripper you use.
Any input would be appreciated.