File to RFC/BAPI - Async- How to capture response field value

Hi,

I am doing File to RFC/BAPI Scenario. I have Two BAPI's. THe same source xml file is mapped to the Two Target BAPI's.

For the first flow i.e File to BAPI1, I need to capture BAPI Response, field value and pass this value as Input to the BAPI2.

How do I proceed with the Mapping. I am working on PI 7.1

Any input would be Appreciated.

Thanks & Regards,

Varun