Hi @all,

this is not my first webservice and everytime it worked that way, by now i
got following exception when trying to call http://<url>?wsdl in my
browser:

System.NullReferenceException: Object reference not set to an instance of an
object.
  at
System.Runtime.Remoting.MetadataServices.WsdlGenerator.RealSchemaType.PrintMessageWsdl(TextWriter
textWriter, StringBuilder sb, String indent, ArrayList refNames)
  at
System.Runtime.Remoting.MetadataServices.WsdlGenerator.XMLNamespace.PrintMessageWsdl(TextWriter
textWriter, StringBuilder sb, String indent, ArrayList refNames)
  at System.Runtime.Remoting.MetadataServices.WsdlGenerator.PrintWsdl()
  at System.Runtime.Remoting.MetadataServices.WsdlGenerator.Generate()
  at
System.Runtime.Remoting.MetadataServices.MetaData.ConvertTypesToSchemaToStream(ServiceType[]
serviceTypes, SdlType sdlType, Stream outputStream)
  at
System.Runtime.Remoting.MetadataServices.SdlChannelSink.GenerateSdl(SdlType
sdlType, IServerResponseChannelSinkStack sinkStack, ITransportHeaders
requestHeaders, ITransportHeaders responseHeaders, Stream& outputStream)
  at
System.Runtime.Remoting.MetadataServices.SdlChannelSink.ProcessMessage(IServerChannelSinkStack
sinkStack, IMessage requestMsg, ITransportHeaders requestHeaders, Stream
requestStream, IMessage& responseMsg, ITransportHeaders& responseHeaders,
Stream& responseStream)
  at
System.Runtime.Remoting.Channels.Http.HttpServerTransportSink.ServiceRequest(Object
state)
  at System.Runtime.Remoting.Channels.SocketHandler.ProcessRequestNow()

The class is more than simple:

class UserProvider : MarshalByRefObject {

       public UserProvider() {
       }

       public User[] search(User user, int offset, int limit) {

           User[] users = user.Search(offset, limit);
           return users;
       }
}

W/o the method it works (but also w/o any function ;-).

This class gets registered as WellKnownService in an HttpChannel to provide
the webservice functionality. It is the second Service registered there,
but as the only one it doesn't work either.

Any hint?

Thanks Thorsten