Mapping Issues for EDI to Message Type

Hi Experts,

I am working on AS2 to Mail scenario. I am trying to do mapping as mentioned below -

Source - 864_5010

Target - General Message Type(manually created)

***When I am trying to map the root node to each other and all other fields to constant, the mapping is working fine at runtime.

***When I am trying to map the target fields in the message type to source fields(not constant) , then it is failing in runtime. Testing through ESR is working fine but end to end it is failing in mapping.

I am not sure why it is failing at runtime when it is working fine in ESR?

Can you please suggest what could be the issue?

Thanks,

Nidhi Srivastava