System expected the element '{http://www.w3.org/2005/Atom}entry'

Hi Experts,

I am trying to update t=data through SAP NW gateway using the /IWBEP/IF_MGW_APPL_SRV_RUNTIME~UPDATE_ENTITY method.

I am using REST Client in firefox browser to test the update service.

Steps Followed .

1.     used GET method to get the x-csrf-token (and that was successfull)

2.     Using the obtained x-csrf-token, i am updating the data (PUT)

3.     Updated the body XML with some data .

Here  i m getting the return error - System expected the element '{http://www.w3.org/2005/Atom}entry'

How ever the request which i made is reaching G/W .

Please help me on this. I am really stuck. Whether to change something in gateway side, or in the XML side.

Thanks in Advance..