Unable to retrieve table data for the checkpoint

"It is not recognizing it"

What is not recognizing what?  Let's see your code and the resulting log and show us where the error is please.

The following link gives you a list of supported controls for table checkpoints in TC 12.50 along with various notes and such on implementing them.

https://support.smartbear.com/testcomplete/docs/testing-with/checkpoints/tables/supported-controls-and-required-plug-ins.html

If your control is not in this list, you cannot use a table checkpoint for it.  Object Mapping does not work to map a class for use here.