On Thu, Jun 25, 2015 at 6:41 PM, Matt Welland <[email protected]> wrote:
> > I've been using IUP for quite a while and I don't recall seeing the > message "callback returned twice". > That particular error comes from runtime.c in the Chicken core - and the procedure that raises it is not directly called either from iup or Jörg's code ... so no obvious indication of what is triggering it. -- Matt Gushee
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