How to Fix QuickBooks Error 6123, 0 When Upgrading or Opening Company File?

QuickBooks Error 6123, 0

This article provides a few solutions to QuickBooks error 6123,0 which occur while upgrading or opening a company file. The error also occurs while opening the company file over a network, opening the file in multi-user mode or restoring a backup.

The error is usually fixed by running the QB File Doctor. If this doesn’t work, then users should try the solutions provided here.

Few Causes of QuickBooks Error 6123, 0

  • Network connection with host computer is disrupted
  • QB Desktop files are damaged
  • Several QB Database Services are running on the system
  • The firewall settings are not allowing QB Desktop files to access the required ports
  • The Windows user is damaged

Solutions for Fix of QuickBooks Error 6123, 0

Using the QuickBooks File Doctor

NOTE: Before trying the manual steps, users must do the following:

  • QuickBooks must have all the latest updates.
  • The file should be copied locally if a backup or portable copy of the file is being restored.
  • If the error occurs while opening a backup (.qbb) file, users must try creating a portable copy of the original file.

The solutions must be tried in the given order.

Manual Solutions

If the QB File Doctor has been downloaded and run and it couldn’t fix the error, users must go to the next solution.

Fixing settings manually


NOTE: After completing each step, users must try to open the company file.

1: The .ND and .TLG files must be renamed.

2: Proper folder permissions must be set up.

3: The company file must be moved to another location.

4: The Auto Data Recovery feature must be used

5: A new Windows user must be created.


1: The .ND and .TLG files must be renamed.

2: The company file must be re scanned with the Database Server Manager.

3: Proper folder permissions must be set up.

4: The company file must be moved to a different location.

5: All firewall and anti-virus ports must be checked.

6: The QB hosting settings must be toggled.

The next manual step is to move QuickBooks to another computer or reinstall it there.

Next, users must check if there’s any data damage and try fixing it.

NOTE: Please contact the AccountingHub QuickBooks Tech Support Team for further explanation on the manual steps to solve the error.

If the problem persists or users need more info, they should call our AccountingHub QuickBooks Technical Support Team at this toll-free helpline .