Situations in which the QuickBooks file doctor download can be useful. 1. When you experience error codes such as Error 6150, Error -6000 -82, Error -6000 -305, Error -6147, 6189, QuickBooks not responding, and so on while trying to open a company file. 2. This software may be required if, aside from the damaged corporate files, the sample files and other company files open correctly. 3. Vendors are also shown in QuickBooks when the user has a blank or missing Customer list. When any of the issues stated above cause problems for QuickBooks customers, the QuickBooks File Doctor Tool comes to its rescue.