I have created a web service transformation to call a web-service in informatica. The have created 3 input ports and 4 output ports, which can be repeating.
For the XPK_envelope field, i have assigned the output of sequence generator.

I am getting following warning message:

Warning: For XML Target [wsc] XML group [X_n3_Envelope0] doesn't have any input fields. No output will be produced for this particular group!
The session succeeds. However the transformation does not load any data into the target.