Troubleshooting QuickBooks Error 6123: Causes, Signs, and Solutions

QuickBooks is a popular accounting software used by small and medium-sized businesses for bookkeeping, invoicing, and financial management. However, QuickBooks users may face errors while using the software. One such error is QuickBooks Error 6123. In this article, we will discuss the reasons, signs, and troubleshooting steps to resolve this error.

What is QuickBooks Error Code 6123?

QuickBooks Error 6123 is a common error that users may encounter while trying to open a company file. This error can occur due to several reasons, such as network issues, damaged company files, or outdated software.

Signs of QuickBooks Error Message 6123

The following signs may indicate that you are experiencing Qb Error 6123:

  • QuickBooks freezes or crashes
  • Error message 6123 appears on the screen
  • You are unable to open the company file
  • You are unable to restore a backup file
  • QuickBooks runs slowly or responds slowly to commands

Prior things to check before troubleshooting

Before you start troubleshooting QB Error 6123, there are a few things you should check:

  • Ensure that QuickBooks is up to date with the latest updates and patches
  • Check the integrity of the company file using QuickBooks File Doctor Tool
  • Make sure that you have sufficient permissions to access the company file
  • Ensure that the company file is not located on a network drive that has insufficient permissions

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Troubleshooting steps for QuickBooks Error 6123

Follow these steps to troubleshoot QB Error 6123:

Step 1: Rename the .TLG and .ND files

  • Open the folder that contains the company file
  • Locate the files with the same name as the company file but with the extensions .TLG and .ND
  • Right-click on each file and choose Rename
  • Add the word “old” to the end of each file name
  • Try to open the company file again

Note: Renaming the .TLG and .ND files can resolve the issue in most cases.

Step 2: Use the QuickBooks File Doctor Tool

  • Download and install the QuickBooks File Doctor Tool
  • Open the tool and select the company file from the drop-down menu
  • Choose the option “Check your file and network”
  • Enter the admin password when prompted and click Next
  • Wait for the tool to scan and repair the file
  • Try to open the company file again

Note: The QuickBooks File Doctor Tool can help to repair damaged company files.

Step 3: Disable the antivirus software

  • Temporarily disable the antivirus software on your computer
  • Try to open the company file again
  • If the error is resolved, contact the antivirus software vendor to add QuickBooks to the exception list

Note: Antivirus software can interfere with QuickBooks and cause Error 6123.

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Q. Can QB Error 6123 be caused by a network issue?

A. Yes, network issues can cause QB Error 6123. Ensure that the company file is not located on a network drive that has insufficient permissions.

Q. Can I restore a backup file if I encounter QB Error 6123?

A. No, QuickBooks Error 6123 may prevent you from restoring a backup file. Try to resolve the error before restoring a backup file.


QB Error 6123 can be frustrating for users, but it can be resolved with the right troubleshooting steps. In this article, we discussed the causes, signs, and troubleshooting steps for this error. If you are still experiencing issues after following these steps, contact QuickBooks Data Services at +1-888-704-1357 for support.

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