QuickBooks Error 6000 is a common error that could occur when you are trying to open a company file. There are a number of different errors that might occur, all pertaining to the 6000 series. The user might encounter error -6000, while opening the company file. Just because of this error, the user will not be able to open or access the company file and the entire work will certainly stop. As our QuickBooks Enterprise support team is here to fix your all errors related to your accounting software.