Company file and transaction log differ
Transaction log files are automatically generated by the company, A simple solution would be to look for and delete an unmatched transaction log file (.tlg). This will re-start QuickBooks on its own.
It is recommended that you find the QuickBooks company file and transaction log file in a folder. In QuickBooks, you can verify the file information for that company by pressing F2 while it is running if you resolve the error and open it successfully. The Product Information window appears but the file information is not available. A path to the company file is shown in the Location field.
A RESPONSE TO QUICKBOOKS ERROR 6189 -816