QuickBooks Accounting software is a versatile tool that can be used for all sorts of businesses with neat features and functionalities. Many users may come across the QuickBooks 6000 83 error. This error is caused by the QuickBooks software not being able to find a specific file. This can happen in a variety of ways, but is most often caused when QuickBooks attempts to open a company file and the file cannot be found. Some symptoms of this error include: the program not opening at all, failing to open when QuickBooks is launched, a message stating that it could not find a company file on the disk, as well as an error message when trying to print a report.