XML Deserialization Error when calling WebService from WebDynrpo

Question

Hi all,
when calling a WebService-method from my WebDynpro-application, I get the following error message:
"Deserializing fails. Nested message: XML Deserialization Error. Can not create instance of class [com.karmann.ApplMan.dto.SoftwareKomponenteDTO] when deserializing XML type [urn:com.karmann.ApplMan.dto][SoftwareKomponenteDTO].."
SoftwareKomponenteDTO is a class that I have implemented. It implements Serializable and overwrites the methods "equals()" and "hashcode()". It contains members of types long, String and java.sql.Date.
The method I call needs an argument of type SoftwareKomponenteDTO. Other methods which return something of type SoftwareKomponenteDTO do not make any problems.
The same error message appears when I test the WebService-method in the WebService-navigator. So I assume that the problem is not the way I call the method from WebDynpro.
Thanks for help,
Christoph

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