Error -6000, -308
Important: Ensure QuickBooks Desktop is up to date. It is also recommended to install and run the QuickBooks Desktop File Doctor tool first before performing any of the following steps. If after using the tool and you still experience the issue, perform the following solutions in the order shown.
This means you are opening a file that is saved on the same computer where QuickBooks is installed.
The .ND and .TLG files are part of your QuickBooks files. These are configuration files that allow QuickBooks to access a company file in a network or multi-user environment.
If these files are corrupted or damaged, you will encounter these errors when you open your QuickBooks files. Renaming these files will not cause you to lose QuickBooks data. These files are automatically re-created when you rescan using the QuickBooks Database Server Manager and when you open your company file.
By opening a sample company file, you are testing if the problem possibly lies with your company file or the QuickBooks application. If a sample company file does not open and instead returns an error, it is an indication that the QuickBooks installation is damaged and should be repaired.