The following message appears when working with a company file that is stored on another computer.
The connection to the QuickBooks company file has been lost. Perhaps there has been a problem with the computer on which data file name resides. QuickBooks must shut down. (Error code: 55, 6, or 64).
This occurs when the connection to the company file has been interrupted. Interference with the connection can be caused by:
These errors are generic Windows messages indicating that the specified network resource or device is no longer available. When a network connection is terminated while QuickBooks desktop has a company file open using that connection, an error appears indicating that the connection has been lost.
To resolve this issue, reboot the computer or server to reestablish a connection with the QuickBooks Desktop data file.
To prevent this issue from occurring in the future: