QuickBooks Error Code 6190 occurs when the software is unable to open a company file due to a mismatch between the transaction log file and the company file. This error commonly appears in multi-user environments when another user is accessing the file in single-user mode or when data becomes unsynchronized. It can also result from corrupted company files or network issues. Prompt troubleshooting is essential to restore access and prevent workflow disruptions in your accounting system. https://www.quickbookkeepingexperts.com/blog/how-to-fix-quickbooks-error-code-6190/