[gtkada] Constraint_Error : s-valuti.adb:223 explicit raise

[Arnaud Charlet]

> You should bind with the -E switch (or, if you use gnatmake, use "-bargs -E")
> to get a backtrace. Then addr2line will give you the traceback).
> I don't think this is related to GtkAda though.

Most likely not indeed.

Even simpler than the above, run under the debugger to find out what is
going wrong. But again, this is not related to GtkAda.

Arno