jmfavre wrote: Is there some documentation somewhere, or code, or whatever that explain the "ctxt" parameter of the navigate function?
No, there is none...
'ctx' is the iteration context, passed from node to node at execution. Its main usage is to transfer parameters from a node to another, using 'getParameterValue("id")' and 'setParameter("id", object)'.
jmfavre wrote: Is there a way to debug such code, to do some print or whatever?
Of course, it is possible to print trace using the Modelio log api, something like Modelio.getInstance().getLogService().info(None, "this is a trace")