QuickBooks Error 6190 is mostly seen when multiple users try to access the company file, which is in single-user mode. When the error appears on the screen, it crashes the active window program, and Windows began to run slowly. The primary reason behind this error is when the transaction log file doesn't match with the company file or when the company file is damaged or corrupted. If you are struggling with this error, then you must run QuickBooks File Doctor Tool to resolve this error quickly and make sure to rename the transaction log file & the company file. If QuickBooks Error 6190 still doesn't get fixed, then contact us at our helpline number (844)-932-1139.