SOAP reciever adapter problem

Hi,

I am getting below error in the adapter monitor for my SOAP recv adapter.

Message processing failed. Cause: com.sap.engine.interfaces.messaging.api.exception.MessagingException

This is using external definition. I ported my PI 7.0 content to PI 7.1. I am wondering how external definitions and interfaces will effect with the setting of software component verion " use of interface objects"

Do I need to put as SAP netweaver 7.0 since it is PI 7.0 content.

Can I change this setting any time. How this will effect.

I could not see this adapter error in my 7.0 env. And not in 7.1 SP04.

is there anything i should check here to avoid this error.

Thanks,

Srinivasa