File converter crashes after 900 items

I am trying to bulk convert my Corel Draw 11, 9, 7, and 6 graphic CD's to TIF images with transparency.  If works extremely well, but it never converts more than 933 files without crashing. Sometimes it crashes after as few as 88 files.

Even if I process 300 at a time, when I get to a total count exceeding 933, it crashes.  Having to reload the source, the destination, the file type and parameters each time is getting frustrating.

Anyone have a suggestion as to how I can prevent this from happening?

I'm running CorelDraw 2017 v19.1.0.419- 64 bit on a Lenovo ThinkCentre i7-6700 @.GHz processor in a Windows 10 Home environment with 32GB RAM and a 1TB HD with 400GB available.

Here's the error message I get each time: