Sometimes, QuickBooks users encounter the error code 6123, 0. This error has been reported by QB users that the error 6123, 0 appears quite frequently nowadays. It is quite frustrating when this unknown QuickBooks Error code 6123, 0 appears. Generally, This error code appears usually when the connection to the QuickBooks company file has been lost in multi-user mode or settings or when you try to open the company file

While establishing or using the QuickBooks company report over the network, you might encounter one or more following errors:

quickbooks error code 6123 0 - Screenshot

QuickBooks Error – 6123, 0

Generally, a Connection to the QuickBooks company file has been lost.

Why QuickBooks Error -6123, 0 Occurs?

  • Infected or corrupt network connection
  • Infected, corrupt, or damage QBW files
  • Windows computer is infected, corrupted, or damaged
  • One or more QuickBooks database services are running simultaneously
  • Possibly that a QuickBooks company file is opened on a new QuickBooks version
  • Might be Multiple instances of QuickBooks database service are running.
  • Backup restoring from an online storage platform or removable storage device
  • The McAfee antivirus is identifying the QuickBooks as a deleterious software or virus
  • Missing, damaged, or corrupt QuickBooks data/ QuickBooks program files
  • Damaged Window user
  • Your firewall services hinder to open QB company file.

You may also like: How to fix QuickBooks stopped working error?

How to troubleshoot QuickBooks Error 6123, 0?

Check out the methods below to resolve the QuickBooks error code 6123, 0 While Opening QuickBooks Company File:

Solution 1: Download and run QuickBooks file doctor tool

QuickBooks File Doctor (QuickBooks Tool Hub) - Screenshot
  • First of all, Download the ‘QuickBooks File doctor tool
  • Next, Detect the data damage
  • Finally, Choose the “Restore the backup of company files”

If in any case, you are unable to open the company file, then send all the company records to the QuickBooks Data Recovery team.

Method 2: Run QBInstall diagnostic tool

QuickBooks Company File Diagnostic Tool - Screenshot

Important Note: If the company file can not be open possibly, ‘Switch to multi-user mode’ option will not be available. In that case, go to File > Utilities > Host multi-user access.

Host multi-user access - Screen shot

Method 3: Rename the company file extension

Follow the procedure to troubleshoot the network data file.

Rename the company file extension - Screenshot
  • At first, Click to the “Start” or “Window” button.
  • After that Choose Explore option
  • Open the Company file & double-click on the file with .ND extension
  • Finally, rename the file extension with .ndold

Read Also: What are the ways to fix QuickBooks error 80070057?

Method 4: Run QB Refresher Tool

Download and run the QB Refresher tool - Screenshot
  • First of all you need to download and install QB Refresher tool on your system
  • After that ensure that your QuickBooks desktop should be closed
  • Now click on Fix my QuickBooks option
  • this process will take some time to refresh the all backend processes that may be causing this issue to you.
  • Finally, hit a click on OK key and then reboot your QuickBooks desktop as well as system.

Method 5: Remove special characters from the file name

Check once to your company file name:

  • The company file name should be 30 characters or less then of it.
  • The company file Doesn’t have any special characters or spaces.

Method 6: Run Quick Fix my Program

  • At first, Close your QuickBooks.
  • After that download the QuickBooks Tool Hub file.
  • In the QuickBooks Tools Hub, choose Program Problems.
  • After that choose QuickFix my Program option. 
Run Quick Fix my Program - Screenshot
  • This will take a few minute to run. In case you have multiple versions of QuickBooks installed, it can take longer then it. Wait until the progress bar is done.
  • Once the QuickFix my Program is done, then you need to open QuickBooks and verify your issue is fixed.

It might be possible that the QuickBooks error code 6123, 0 still persist. Well, we would recommend you to consult with the QuickBooks Support team. We are a team of strong, qualified, and QuickBooks certified consultant. For any query or problem related to QuickBooks software, you can contact them with no hesitation at our toll-free number i.e. +1-800-969-7370.


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