External context mapping issue: cannot create nodes,no mapping defined yet

Question

Hello everybody,
I'm trying to use the external context mapping as it is explained in http://help.sap.com/saphelp_nw04/helpdata/en/d7/e551cf896c3a49bb87bb4ce38c99c8/frameset.htm
I did it in the past without any problem, but now, when i try to create a new node, i get the error "cannot create nodes,no mapping defined yet." This error appears as i try to create an element of the node (in the Internal Component), this way:
     IPruebaNodoElement elto = wdContext.nodePruebaNodo().createPruebaNodoElement();
     elto.setPrueba("Esto es una prueba");
     wdContext.nodePruebaNodo().addElement(elto);
The mapping is correctly done in the "Embedder Component", and the attribute "isInputElement"=true in the Interface Controller of the "Internal Component".
Any idea, any clue?
Thank you very much in advance
Isidro López

Answer 1

Frankly speaking: I just read again, but very carefully, all the steps explained at
http://help.sap.com/saphelp_nw04/helpdata/en/d7/e551cf896c3a49bb87bb4ce38c99c8/frameset.htm.
Read it carefully and try to implement that example, that could be really helpful.