Another thing to look at is the RELATIVE PATH to these files from EACH of the workstations that are opening the file.
For example, if WS#1 shows the server as mapped drive W: and WS#2 shows it as Q:, problems may occur.
Also, if you are NOT mapping drives and finding them only by MY NETWORK PLACES... you may have trouble.
Duane
Visual Frontiers
AC25 :|: AC26 :|: AC27
:|: Enscape3.4:|:TwinMotion
DellXPS 4.7ghz i7:|: 8gb GPU 1070ti / Alienware M18 Laptop