How to fix QuickBooks error code 6190 [ QuickBooks error code 6190](https://www.conectier.com/blog/quickbooks-error-codes-6190-816/) appears when the QuickBooks software tries to access the b company file but cannot. This error was caused by more than one user trying to access the company file. Even if there is a conflict between the company and the event log file. A transaction file is basically a file that records all the transactions made by a company. These types of files are often automatically saved to QuickBooks without the user's permission.