Calling ABAP Function Module in BODS, but not RFC_enabled

Hello Experts

We have an ECC ABAP Function Module takes 5 input parameters and returns Division Name for an Employee and Employee PERNR is one of the input parameters for the Function Module.

I tried adding a function call in the target schema of Query Transform and the output parm passes out as an Output column. But getting an error that ABAP FM is not RFC_enabled. I checked attributes, and it is not RFC_enabled.

So is there way to invoke this FM as part of BODS ABAP Dataflow?. Becuase the code executes on ECC, it does not need to be RFC enabled, I believe. But on the Query Transform, the option "New Function Call" isn't enabled or it is greyed out, I can't select it.

What is the solution to invoke this ABAP FM with enabling RFC on it ?

Please provide me your inputs.

thank you