I have a client on a network. Two users are using QuickBooks Premier Professional 2010. User #1 has the database on his computer. User # 2 access that file from her workstation (multi-user mode).
Up until two days ago User#2 routinely backed up the company file to her workstation. (Company file on #1, back up file on #2). When #2 attempted a backup yesterday, she received a nondescript "Failed" error. She tried it again today with the same result. User #1 can't even open the file. It starts to open, the Company file name appears on the top of the QuickBooks window, then fails with a "connection has been lost error. Then, after several seconds, anotother error appears. "Unexpected Error". C-343.
I registered the MSXML.DLL files. (Regsvr32 MSXML3.dll & (Regsvr32 MSXML4.dll, but that did not help.
The file size is 311MB.
Thanks in advance for your help.