When QuickBooks is unable to access the company file that is on another computer, QuickBooks error H202 is the result. Typically, problems with network configuration or connection between QuickBooks and the server housing the company file are to blame for the error. Users can attempt running the QuickBooks File Doctor tool, updating QuickBooks to the most recent version, or setting up their firewall settings to let QuickBooks access to the network in order to fix the error.