A customer just got new computers and a server. The VDF application uses Word Mail merging. Word8.pkg The first time the mail merge runs it is perfect. If you run another mail merge it crashed with AttachDispatch failed error: 4407 and lots more errors and then crashes the application. I also tested it on their old PC on the network and it did the same crashing. (it worked 2 weeks ago). I tested it on my stand-alone PC here and it works. They are using Word 2016.