error running any gui program at all

Hi just learning Rebol here and wanted to do the gui examples Saphirion R3 gui as shown at http://learnrebol.com/rebol3_book.html Unfortunately any example I try even the simplest seems to fail with 'in does not allow none! for its object' as you see below: ./r3-view-osxi notes.r3 Fetching GUI... ** Script error: in does not allow none! for its object argument ** Where: reduce either parse reduce-opts view unless actor all foreach do-actor if view do either either either -apply- ** Near: reduce val Is there a way to fix it? (if it matters - I'm on a Mac btw)

To my knowledge, I don't believe there was ever a working version of View for Rebol 3. Atronix, I think, have it on their roadmap to eventually release a gui for Ren-C OS X, would need to verify that though. For now there's Rebol 2.7.8 and Red (can install using Homebrew: https://github.com/red/Homebrew-red )

Thanks Chris. The impression I got from reading http://learnrebol.com/rebol3_book.html is that this had been working at one time and has broken sometime since the doc was written (it's dated 2013). I switched to a windows machine and the Atronix version and am able to do the examples that way. Atronix doesn't show a Mac download only a Windows download. (there's a bit of irony here since the http://learnrebol.com/rebol3_book.html doc is extolling the virtues of how great Rebol 3 is for cross platform GUI development!) Anyway thanks. I'm probably not appreciating the ins and outs of Rebol 2 versus 3 and Rebol/View versus "GUI" versus Ren-C I'm pretty new... You were partly saying Rebol 2 is better for me to learn from since Rebol 3 isn't mature right. Rebol 3 has been around awhile now though - is it progressing I wonder? I did play a bit with Red but it seemed rough around the edges as well. I'm a developer myself btw, I was partly playing with this stuff wondering if I might try and help contribute to one of these projects as open source.

R3 Mac development was initially done by Saphirion, but Mac GUI was never completed. Atronix moved forward with development, but only on Linux and Windows. Saphirion did release a working Android GUI. Their Mac code base would be a good place to start if you want to contribute to R3. If you want to use Rebol on Mac, R2 is mature.

Ren-C ( https://github.com/metaeducation/ren-c ) and Red (https://github.com/red/red ) are both in active development. In Ren-C the GUI is an extension being developed by Atronix and not part of the main repository. Shixin ( https://github.com/zsx ) is the point person for Atronix's involvement in Ren-C and would know the ins and outs of that extension. Can reach him in the Rebol chat room ( https://chat.stackoverflow.com/rooms/291/rebol ).

Hm, meant to @ Darren but put in name field instead—d'oh!