This error usually occurs if the OST or PST file you are using is:
- Unavailable.
- Protected with file permissions.
- On a share on a server and the network is down.
- Corrupt.
To correct this problem, store the OST or PST file on the local computer.
You may also want to run the scanost.exe and scanpst.exe tools to verify file integrity.
C:\Program Files\Microsoft Office\Office12\SCANPST.exe