QuickBooks Error 6123 0 - How To Fix & Repair

Know how to fix QuickBooks Error -6123, 0? This issue occurs when user opening or upgrading a company file. This can be fixed if reinstall firewall settings, update your anti-virus software or repair company file.

QuickBooks Error 6123 0
QuickBooks is a complex accounting software and there are times when you could experience difficulties while using it. Thankfully, QuickBooks does not just stop working and leave you puzzled. It gives you errors messages. One such error message users encounter is the 6123, 0 messages. This can happen when you are trying to open a company file or attempt to upgrade it to a new version of QuickBooks. This problem can particularly happen when you are in multi-user mode. 

Causes of QuickBooks Error 6123 0 

  • Error 6123 can show up due to a variety of reasons some of which are:
  • Firewall settings that prevent files from connecting with ports
  • The computer may be running multiple QuickBooks database services
  • The data file is damaged or is corrupt or the QuickBooks installation is damaged.
  • Someone changed the name of the computer that is hosting the file.
  • Anti-virus program with block web bugs filter is active in the background.
  • Corrupt windows installation
  • Network connection is disrupted.
  • You have installed third-party application along with QuickBooks desktop 2018. 

You Can Try Various Approaches to Resolve This Error 6123 

Approach 1
  • If you wish to allow multi-user access in a desktop installation of QuickBooks pro then add “QBDataServiceUser18” to the local administrators' group in windows.
  • Sometimes when you try this you get the message that multi-user access is enabled in which case you can choose to disable it and it will work.
  • If you upgrade to Windows 10 and this error shows up then start QBCFMonitorService.
  • Exclude .qbw file from the antivirus blocking feature and you should be able to open the company file.
Read This: QuickBooks Installation EXEAdapter Error 
Approach 2
This is for those users who use QuickBooks desktop 2006, 2007, 2008 and 2009 as well as QB Desktop 2015, 2016, 2017 or 2018.

  • Download, install and run QuickBooks file doctor.
  • If you have the company file in a previous version of QuickBooks, try to restore the file in that version first.
  • If you are upgrading to QuickBooks Pro or Premier install QuickBooks accountant or QuickBooks premier trial versions to convert QuickBooks Pro or Premier Files before attempting to open them in the new version.
Approach 3
If it is a multi-user set up you can do the following:

  • Rename the .tlg and .nd files
  • Set up proper permissions to access folders
  • Re-scan company files using the database server manager.
Approach 4
  • If approach 3 does not work then you may have to remove and uninstall QuickBooks and re-install the application.
  • If this does not work the data file may be corrupted in which case you can use QuickBooks Rebuild and Verity utilities to restore the file. The rebuild utility creates a backup copy which you can save in a specific location.
  • Next, run the Utilities-verify data action from the file menu. If there is an error it will prompt you to rebuild now.
Read This: QuickBooks 80029c4a Error 
If none of the above works then give a quick call to our QuickBooks experts for a solution. 
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QuickBooks Sign In - Login Help & Account Recovery: QuickBooks Error 6123 0 - How To Fix & Repair
QuickBooks Error 6123 0 - How To Fix & Repair
Know how to fix QuickBooks Error -6123, 0? This issue occurs when user opening or upgrading a company file. This can be fixed if reinstall firewall settings, update your anti-virus software or repair company file.
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QuickBooks Sign In - Login Help & Account Recovery
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