plp file disappears until reboot or remap drive

[Anonymous]

3 users (10% of users) experience disappearing plp file every 2 or 3 days. Sometimes it occurs when locking machine when attending meeting. On return to workstation they unlock machine and it is really slow and plp file is missing (can see it on server or if unmap drive on workstation and remap). Although remap drive is a workaround the workstation is still slow so 3 users end up rebooting anyway. HP xw4600 Workstation Intel Core 2 Quad CPU Q6600 2.40GHz 1.58GHz, 4GB Ram, XP Pro SP3.

[Erika Epstein]

Not that I know the answer, but which AC version you are using?
You should also contact your local graphisoft tech support.

[Anonymous]

V12 (check for updates show it is up to date i.e. "Your ArchiCAD is up-to-date!" and library is "12 INT 2675 Win FULL 2009-04-15"