SolidWorks communication with Windchill Workgroup Manager

[STEVE_V-M]

I am using Windchill PDMLink Release 12.0 and Datecode with CPS 12.0.2.2

When launching SolidWorks 2019, it cannot communicate with the Workgroup Manager. I've tried following the instructions on Article - CS310741 but it does not work. I need help in resolving this issue.

Here are the errors that I faced
Unable to connect to Windchill Workgroup Manager, if more than one instance of the authoring application is running, the new one will run disconnected.

[VladimirN]

Article - "Receiving following error while launching a 3rd party CAD application: "Unable to connect to Windchill Workgroup Manager. If more than one instance of the authoring application is running, new one will run disconnected."": https://www.ptc.com/en/support/article/CS36129 

[STEVE_V-M]

Thank you VladimirN for your input.  I tried the methods that this article - CS36129 - is suggesting but my SolidWorks still has this problem and is not connecting to Windchill Workgroup Manager.

[prerev_kompan]

Hi Steve

We see that message some times. Usually it's because SolidWorks hasn't closed down properly from the previous session.
If you check Task Manager, you might have 2 or more SolidWorks instances running.

Can be found in Background Processes.

Close all SolidWorks entries.