This is very likely a permissions / access problem at some level, though I'm not sure where to start.
Running a project on FB Server 6.3.0.731 that calls the "Get Disk Free Space" action fails with "Error getting drive info : -1" under Windows 7 Enterprise when pointed at a mapped network drive.
UAC has been turned off.
The project doesn't have a problem when run from FB as the same domain user that the FB Server is configured to impersonalize. I've checked that the "whoami.exe" returns the expected domain user.
Local drives work fine regardless where the script runs.
Thanks