Updating CDT using Set external PV plugin

I am trying to update particular values of a CDT from one process model to another active instance process model using Set External PVs plugin. When I try to give the same CDT type, it is showing the following error - "Invalid Cast: Cannot cast from type 'Text' to type 'CDT name' (Data Inputs)". I tried giving text datatype that didnt work as expected. It is working fine for primitive data types but not for CDT. Can anyone please let me know how to do that?

Thanks in advance