Is QuickBooks error 6073 causing problems whenever you try to open the company file? If yes, then you have to fix this issue as soon as possible, and for doing so you have to follow the below-mentioned troubleshooting tips: o If the company fie of QuickBooks is opened up in the Single user mode, you have to switch it multi-user mode either in the host computer or in another system. o It would be best if you changed the setting read-only mode of the company file with the ‘full control’ option in the setting option. o Even you can try to use the QuickBooks File Doctor to resolve this error. If the steps mentioned above doesn’t help you in fixing the error, then you can call quickbooks technical support phone number to speak with the experts who will resolve your issue promptly.