Solution for Quickbooks Error 6190 and 81
                     Quickbooks Error 6190 and 81
Where does QuickBooks Multi-user Error 6190 come from?
It's very likely that the file is saved in a location outside your computer, and you weren't allowed to access it 
there. When a file is open in a single-user mode on another computer, you will sometimes be restricted 
from accessing it from the server. Below is a list of possible explanations for the 
Quickbooks Error 6190 and 81
1. Files containing transaction logs and network data were damaged.
2. There are damage to the company's file. 
3. QuickBooks program has been corrupted. 
Solution for the Quicobooks error 6190
   Download and run File Doctor 
1.Double-click the QuickBooks Tool Hub icon to start the application.
2. Select the Company File Issues tab from the left side of the window. 
3. Click Run QuickBooks File Doctor. 
4. Select the Browse button, then choose the company file from the QuickBooks folder. 
5. Click Check your file and then select Continue. 
6. Type your company file admin password if given the option. 
7. Then click Next and wait for the repair to complete.
8. Restart QuickBooks ad check if the error is resolved.