I am not an expert on Avid DV Express.
Presently, I am using Avid DV Express version 3.5 to control BayStor BK-2500 (a HDD based AV Archiver) to do RS422 Insert Recording.
I get a random error "Exception: Failed to find pre-roll point on tape".
I set the Pre-roll:
(a) to be less than 10...