Hi Ruben,
- According to below configuration all interfaces from ECC by default send to PI integration engine.So your interface by default it is sending to integration engine and there is no receiver determination for your interface that is why you are getting RCVR_DETERMINATION.NO_RECEIVER_CASE_BE error.
- You have created the ICO for your interface, ICO wont run on integration engine it will run only on adapter engine, you need to route your interface to adapter engine not to integration engine. Please check below document for configurations.
Regards,
Praveen.