[omniORB] BAD_PARAM_WrongPythonType

[Compan]

Hi,

My python client gets this exception when invoking a request.

IDL:

    struct Flow
    {
      string source;
    };

    interface CollectorConsumer
    {
      oneway void on_test (in Flow f);
    };

python code:
    flow = new.instance (Flow)
    flow.source = 'ipe'
    consumer.on_test (flow)

Using -ORBtraceLevel 10, the output is:
  omniORB: throw BAD_PARAM from pyMarshal.cc:263
(NO,BAD_PARAM_WrongPythonType)
The exception is thrown by the validateTypeULong() function.

I have no idea of how to solve this so any help would be appreciated.
I'm using python 2.4.1 and omniORB 4.0.6 (with omniORBpy 2.6)

Thanks,
  Arnaud.