DVDFab Stalls when encoding to mkv

I accidently made this post in the wrong Forum so I am now reposting it here for better attention.

The Problem:
DVDFab Stops encoding when reaching the 81.16% mark.

I am encoding “Casino Royale” region 1 to an mkv file with h264 & original audio track. Not the new Bond, but the old 1967 original version. The encoding starts as normal with an average 65 fps. Then at the 80% mark the frame rate starts to drop slowly until it reaches 0 fps.

My disc is clean, scratch free and seems to play no problem on my DVD player. Open for suggestions.