Parameter types allowed

Hi,

I can't find any specification about what parameter types that are allowed in a code unit that is published as a web service.

Is the DotNet type not allowed at all? i've tried to publish code units that has sortedlists and DataTables as parameters, but when i try to download the contract i get an error in the eventlog:

Service:
User:
Type: System.NotSupportedException
Message: DotNet
StackTrace:
at Microsoft.Dynamics.Nav.Types.XmlTypeHelper.SimpleTypesSupportedInWebservice(NavType navType)
at Microsoft.Dynamics.Nav.Types.XmlTypeHelper.XmlTypeNameFrom(NavType type)
at Microsoft.Dynamics.Nav.Service.WebServices.ServiceCodeunitWsdlAdapter.VisitParameter(ComplexTypeBuilder typeBuilder, ParameterInfo parameter)
at Microsoft.Dynamics.Nav.Service.WebServices.ServiceCodeunitWsdlAdapter.VisitInputParameters(ComplexTypeBuilder typeBuilder, ParameterInfo[] parameterInfo)
at Microsoft.Dynamics.Nav.Service.WebServices.ServiceCodeunitWsdlAdapter.<>c__DisplayClass4.<VisitMethod>b__1(ComplexTypeBuilder typebuilder)
at Microsoft.Dynamics.Nav.Xsd.BaseXsdBuilder.CreateType(ComplexType complexDelegate)
at Microsoft.Dynamics.Nav.Xsd.ElementBuilder.CreateType(ComplexType complexDelegate)
at Microsoft.Dynamics.Nav.Service.WebServices.ServiceCodeunitWsdlAdapter.<>c__DisplayClass4.<VisitMethod>b__0(ElementBuilder elementBuilder)
at Microsoft.Dynamics.Nav.Xsd.BaseXsdBuilder.CreateElement(String name, ElementNumber cardinality, ElementType elementDelegate)
at Microsoft.Dynamics.Nav.Xsd.XsdBuilder.CreateElement(String name, ElementNumber cardinality, ElementType elementDelegate)
at Microsoft.Dynamics.Nav.Service.WebServices.ServiceCodeunitWsdlAdapter.VisitMethod(MethodInfo method, PortBuilder port, BindingBuilder binding)
at Microsoft.Dynamics.Nav.Service.WebServices.ServiceCodeunitWsdlAdapter.VisitMethods(MethodInfo[] methods)
at Microsoft.Dynamics.Nav.Service.WebServices.ServiceCodeunitWsdlAdapter.Write(XmlTextWriter output, Uri requestUrl)
at Microsoft.Dynamics.Nav.Service.WebServices.ServiceBroker.MetadataFor(UrlParser relivantURLPart, Uri orginal, TextWriter output)
at Microsoft.Dynamics.Nav.Service.WebServices.ServiceBroker.Invoke(Boolean isSoapMessage, String serviceName, Uri url, XmlReader input, TextWriter output, String sid)
at Microsoft.Dynamics.Nav.Service.WebServices.NavWebService.<>c__DisplayClass3.<>c__DisplayClass5.<ProcessMessage>b__1()
at Microsoft.Dynamics.Nav.Service.WebServices.Disposer.Scope(Code code)
at Microsoft.Dynamics.Nav.Service.WebServices.NavWebService.<>c__DisplayClass3.<ProcessMessage>b__0(StreamWriter streamWriter)
at Microsoft.Dynamics.Nav.Service.WebServices.WCFUtil.GetPopulatedMemoryStream(StreamFillingCallback callback)
at Microsoft.Dynamics.Nav.Service.WebServices.NavWebService.ProcessMessage(Message message)
at SyncInvokeProcessMessage(Object , Object[] , Object[] )
at System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(Object instance, Object[] inputs, Object[]& outputs)
at System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage4(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage3(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage2(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage1(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean isOperationContextSet)
Source: Microsoft.Dynamics.Nav.Types