[Twisted-Python] Pass error (exception) message to XMLRPC client

Hello, I've searched on the (Twisted) website and mailinglists, but failed to find the answer to my question. Is is possible to pass the original exception code/message to the XMLRPC client? When an exception occurs, the client get's a general 'error occured' message and I would like to be able to let the client know what went wrong. How can I accomplish this with Twisted? BTW I'm working with the latest Twisted 1.x release (Debian) Regards, Remy Cool