Hi Rajesh
I will add a few comments on this question based on the support case we worked and mark it as answered
we will work further on the support case.
1 . The message " cannot iterate through message's parts " indicate that the GW is not streaming
the request . In this case because the streaming was only set for the download.
2 . Enabling the service debugger on a streaming request will break the streaming and cause the same message .
3 The read timeout need to be set large enough , we are still investigating this part
Regards
Dirk