I have upgraded to BE version 12 because of numerous errors using version 10 and 11d. The continuing error are random VSS errors. They don't occur every day. I may run the same job today and it complete fine, but tomorrow it will get VSS error. The link V-79-5733-65078 says its because Advanced Open File option isn't installed, but obviously, if it works 4 days in a row, that isn't the problem. It only occurs on my file server (not on exchange or blackberry) and it does not matter where I am writing the backup to (sometimes I backup to NAS, sometimes to a local device). I can't seem to find any other information on how to get this corrected. Any help is appreciated.