Retrieving data from RM Server using Tibco Spotfire

Hi RMers!

I've been trying to retrieve a dataset from inside Tibco Spotfire using a RM web service. I've just retrieved the Titanic dataset and connected to the output port. Then in the web service I select Odata as output format and then JSON (I have tested all other variants as well).

However, I obtain an exception on the Spotfire side.

An exception was thrown by the data connection.<br>Exception text:<br>System.NullReferenceException: Der Objektverweis wurde nicht auf eine Objektinstanz festgelegt.<br>   at Spotfire.Dxp.Data.Access.CancellationHelper.Execute(CancellationToken token, Action action)<br>   at Spotfire.Dxp.Data.Access.CancellationHelper.Execute[T](CancellationToken token, Func`1 function)<br>   at Spotfire.Dxp.Data.Adapters.OData.ODataAdapterConnection.ListTablesCore(CancellationToken cancellationToken, ReadOnlyCollection`1& tables)<br>   at Spotfire.Dxp.Data.Access.Adapters.DataAdapterConnection.ListTables(CancellationToken cancellationToken, ReadOnlyCollection`1& tables)<br>   at Spotfire.Dxp.Data.Access.Adapters.DataAdapter.TryListTables(IDataAdapterExecutionContext executionContext, AdapterCredentialsValue credentials, CancellationToken cancellationToken, ReadOnlyCollection`1& tables)<br>   at Spotfire.Dxp.Data.Access.Adapters.DataAccessDataSourceLink.<>c__DisplayClass47_1.<ListTables>b__0(CancellationToken token)<br>   at Spotfire.Dxp.Data.Access.Adapters.DataAccessDataSourceLink.ExecuteAdapterMethod(ImpersonationPolicy impersonationPolicy, AdapterMethodDelegate method, Nullable`1 cancellationToken)

I have used user and password authentification, but that doesn't seem to be the problem. Could using anonymous login help? Has anybody tried something similar?

Thanks!

Sebastian