.SWF file not prepared for testing getting pop-up message in TC while recording the Scenario

Check out the following help topic.  Have you done the steps indicated for the particular scenario you are attempting?  Basically, the message is telling you that there is some prepatory work that needs to be done in order to test the SWF file you are attempting to test.

https://support.smartbear.com/testcomplete/docs/app-testing/web/flash-flex/requirements.html#Prepare