I cannot select a object on screen even after adding the object class to MSAA option

Hi hina 

Is it the correct MSAA pattern you are using ?

If you are unsure then select the astrix and rerecord your test. 

You could also try the same with UI Automation, add your class class

https://support.smartbear.com/testcomplete/docs/reference/test-objects/controls/desktop/uia/index.html

Bare in mind the astrix may cause performance issues so its just to see if it works.

Now, it may be a derived class or custom class you are using. 

Check out how to add them here in the 

https://support.smartbear.com/testcomplete/docs/working-with/managing-projects/properties/object-mapping.html

We could also look at using other approaches to interact with your control, for example OCR which would be alot better than Co ordinates

https://support.smartbear.com/testcomplete/docs/testing-with/object-identification/ocr/about.html

Aside from that I would recommend either reaching out to your SmartBear account manager/Representative, they book a call with an engineer to have a closer look or raise a ticket with support if they have more information. 

KR

Vinnie