Erel,
Thank you for reply. I've created a simple test project where I could reproduce my error. Just choose any button - by defaul either error message or another form would be openned - but then for some strange reason I could only close that form window by clicking on red cross icon in the top right corner of the window. Selecting Close button that called "form.close" code does not work for me any more for some strange reason. Apart from installing B4J v 3.0.0 and later update to 3.0.2 - no software changes were made on my computer... Could you please advice ?
Thank you beforehand,
Regards,
Alexey