QuickBooks Desktop records messages about what is happening in QuickBooks in a specific log file.

  • In Windows, the file is called QBWin.log
  • In Mac, the file is called QuickBooks.log (applies to US only)

The log file contains QuickBooks Desktop messages, as well as information created by Verify Data, Rebuild Data, and Condense Data utility (applies to US only). This .log file will help you determine what caused certain errors in QuickBooks or in your company file.

Note: Errors like "IsQBInUseLockFilePresentAndLocked...LCK can't be found. Error = 2" in QBWin.log is not a sign of data damage and should not be considered as one when troubleshooting data damage.