[Gretl-devel] Re: ui-maker and missing warning messages

On Mon, 16 Feb 2026, Sven Schreiber wrote: > > I'm not disputing that it _could_ be defined, but it just isn't, in > my case (and most similar other cases, I'd argue) - at least not in > the current function scope. So what I don't understand, why no error? It would be nice if errors of this sort could be caught at the stage of creating a gfn file but that would not be very easy. The alternative is to flag an error when the ui-maker is actually called upon.

What we do at present is issue an error message on stderr. The thinking behind that is that ui-maker functionality is a refinement which is not essential to getting results from a function package, so we'd rather not abort on a ui-maker failure. But a function writer can/should pay attention to stderr when debugging a package.