What to Do When QuickBooks Error 6143 Keeps Appearing QuickBooks Error 6143 can be caused by a variety of issues, including corrupted files, network interruptions, or incorrect user permissions. If the error persists, run the QuickBooks File Doctor tool to repair the company file, check your network connection, and ensure QuickBooks is properly configured for multi-user mode. ----- https://asquarecloudhosting.quora.com/Various-errors-in-the-QuickBooks-Desktop-could-be-caused-by-corruption-in-its-company-file-QuickBooks-error-6143-appear