Hello Jorge,
Finally I changed components and instead of using TIWCGJQGMap3Ex I am now using TIWCGJQGMap3. This works as expected. I made no changes to the delphi code calling the dialog. So I really don't know where the bug is with TIWCGJQGMap3Ex. Toggling debug to true or false with TIWCGJQGMap3 made no difference. In both cases everything workings fine.
Thanks for your help.
Can