Why does QuickBooks Error 6123 occur?

by Alex poter
Published: September 7, 2022 (3 weeks ago)

One of the following factors may be the root of the QuickBooks Error 6123:

  • The primary computer’s network connection is down.
  • Alternatively, a firewall network is blocking a port needed to access the server hosting the company file.
  • The same company file is open in a brand-new instance of QuickBooks.

On your computer, a number of QuickBooks database services are running.