SAP GTS & Feeder System Architecture

Hello All,

I am a new learner to GTS system and trying to harmonize the Feeder and GTS system. Could you please help me to get the patch levels for Feeder and GTS? In my previous system, I used to get the below error and not able to test the Customs Management. It was showing different release error. Request you to help me to harmonize the system.

Thanks & Regards

Rahul