Fault getting XML node when calling webservice

Question

Please assist, I'm calling a webservice from SAP using a generated proxy and not going via XI. The webservice has 4 methods. Three of which make a successful call to the websrvice. When calling one of the methods, I get a SOAP fault. It does not say what the fault is.
On debugging I traced the fault to class CL_SOAP_MESSAGE_NEW method DESERIALIZE_HEADER_ NEW, at point " 4.1- ... and get method ".  A method call is made to return the next XML node. This method executes a kernel module coded as "method IF_SXML_READER~NEXT_NODE
by kernel module fxkmsrd_next_node fail", and the method name returned is "FAULT", which then triggers a SOAP FAULT exception.
I do not know how to access this kernel module to trace the error. I need assitance in identifying why I'm getting a fault back. Please assist. Points will be awarded.
Maggie

Answer 1

Thanks for this hint, Amar. But this points directly to my next problem: How can I set this parameter. I know how to set flat parameters (e.g. of type long, boolean, etc.). But how can I set a parameter of a complex type?
For example I can call
    wdContext.currentSaveElement().setIdFather(long id)
in order to set the parameter idFather of type long for the WebService-method save(). But there is no method
     wdContext.currentSaveElement().setIdFather(SoftwareKomponenteDTO aKomp)
Could you please help me on more time?
Kind regards,
Christoph