I have a similar issue, at least I think, as I'm really not sure exactly what the first post is asking. This is with X5. When I post a file, the Mastercam editor opens but doesn't open the file and I get a DLL#48 error. The specific error is: An error has occurred in sub OpenFile() Error loading DLL #48 I have used this version on my computer before, but reinstalled the software recently and this is the first time I have tried to post a program since re-installation.