Some reasons for the occurrence of Quickbooks Error 6123
The “Firewall” is blocking the network or any port.
Some QB database or files is corrupted or damaged.
An old version of the QB.
Operating System or Windows is not working properly (damaged).
Due to McAfee Antivirus private settings.
If more than one version of QB database service is installed or running on the system.
Major Symptoms of Quickbooks Error 6123
The error message is displayed on the user screen.
The company file is not opening in the QB software.
The QB software is not responding properly.
The present Window OS is corrupted.
The workstation hangs up or stops for some minutes.
