Have you tried re-installing FileMaker Pro on the client machines?
Have you done any diagnostic checks on those machines? Checked user accounts etc?
There's only 1 install, shared among multiple users (all of whom have a license). It's a thin client environment, like RDP. All users but 1 work. We have deleted the user profile and recreated it, without luck. We have moved the user to another server, but within a couple of days, it breaks on them again.
Filemaker is not designed to be shared in that manner. See the following link:
Your file is more than likely corrupt because of this type sharing and probably will get worst.
You will have to run recovery on the file to repair.
Each machine needs filemaker installed. The server host the databases which be open on the server first, then each client connect remotely.
like remote desktop???
Can you describe in more detail how you are doing this? I agree that this could be accessing the database in a manner not recommended by FileMaker Inc due to possible file corruption, but would need to see a more detailed description to be sure.