Why does QuickBooks Error 6123 occur?


Why does QuickBooks Error 6123 occur?

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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.

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