When you encounter QuickBooks error 6000, you will notice that it is usually accompanied by two or three numbers after the error, such as QuickBooks error 6000-77. This error is generally associated with a problem that generally occurs when a user is attempting to open a company file. As a QuickBooks user, you should remember that this sort of error code can occur on a local as well as network setup. One of the safest ways to fix Error 6000 is by using the QuickBooks File Doctor to run a diagnostic scan and resolve the error. You can call the QuickBooks customer support number to know more about the QuickBooks File Doctor and how to use it. However, if that does not work you can refer to the troubleshooting steps mentioned below to try and fix the issue. Since QuickBooks error, 6000 can occur on your network as well as local set up you should select the appropriate steps in order to resolve the problem.