You may find more responses by creating free account at https;//fmdev.filemaker.com/
There are also 7 or 8 Filemaker groups at http://linkedin.com - some are specialized such as Filemaker Optimization.
If that client signs on with another computer... realizing a random symptom is hard to diagnose.
That user does monthly maintenance? Or has networking utilities installed that are unique to that computer?
Is on the same router as the others?
It is not machine specific. I have had it fail on a few different machines. You can log onto another machine using the same user account and import with no issues. I realize I am probably not going to figure out a what is causing it I just wish I could 'restart' the ODBC on the server so I am not booting all my users for one computer. I have 25 desktop clients and around 20 Go clients so kicking them all out is kinda catastrophic :D.
Thanks for the Dev forum tip; I have an account over there as well and will fish over there too!