Verify that the computer on which the data file is stored is on and not in a standby or hibernate mode. Verify firewall settings are correct and manually restart the QuickBooks Database Server Manager.
Network errors such as error -6000, -80: "An error occurred when QuickBooks tried to access the company file," can occur when restoring a QuickBooks company file from a backup, updating a company file, or attempting to open a company file.
Lists the QuickBooks files that need to access the Internet through a firewall. Includes QuickBooks versions 2005 through 2009 and later.
Sequentially ordered list of articles to help you install and configure QuickBooks in a multi-user or network environment.