Fix QuickBooks Error 6000 -80 [Multiple Company File Issue]

  • Error 6000, 80 is a complicated and concerning issue that requires urgent attention. It is part of the 6000 series of errors that often occur while attempting to open a company file in QuickBooks Desktop. These errors can affect both single-user and multi-user modes, and diagnosing the root cause can be confusing as they often result from a few common reasons. To prevent data loss, we recommend following the troubleshooting instructions provided in this article.