Sending error messags as XML in Web Services

How can I send as an output in RFC function working as WebService error as XML. What I'm talking about?
I use exceptions in my RFC function which is warking as WS.
I want to recive form WS an error description as a XML.
When WS is working correct it send as an output XML, but when any error is performed there no response in XML file is generated. I want to generate XML with error info but I have no idea how.
Regards, Tomek

I want to receive error form WS which is looking like below:
<b>Sample output for WS when error doesnt appear</b>
<soap-env:Envelope xmlns:soap-env="http://schemas.xmlsoap.org/soap/envelope/">
     <soap-env:Body>
          <n0:ZtsyErrorTestResponse xmlns:n0="urn:sap-com:document:sap:soap:functions:mc-style">
               <ENumber>1</ENumber>
          </n0:ZtsyErrorTestResponse>
     </soap-env:Body>
</soap-env:Envelope>
<b>This I want archieve</b>
<soap-env:Envelope xmlns:soap-env="http://schemas.xmlsoap.org/soap/envelope/">
     <soap-env:Body>
          <n0:ZtsyErrorTestResponse xmlns:n0="urn:sap-com:document:sap:soap:functions:mc-style">
Heer should appear error information
          </n0:ZtsyErrorTestResponse>
     </soap-env:Body>
</soap-env:Envelope>

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Edited by: twf123 on May 5, 2010 11:59 AM
Edited by: twf123 on May 5, 2010 12:00 PM

twf123 wrote:
What I have been told is that the content of the ReceiveDocument element has been url encoded which causes the &lt and to correct it I need to change the paramater type from object to xmlnode and to build the request as an xmldocument. Where do you change the parameter type?
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Sending error messags as XML in Web Services

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