I would try a new J session. the graphics api relies on maintaining a stateful relationship with external state, and I'm thinking an essential part of that has been deleted in your current session.
If you also get this is a fresh J session I would suspect that J was not installed properly on your machine. If neither of these guesses was correct, though, please let us know? Thanks, -- Raul On Sun, Sep 29, 2013 at 7:53 AM, Jeremy Smith <[email protected]> wrote: > Hello everyone, > > I'm running jgtk701 on a Mac Mini (though I experience the same behavior > described below on a Win 7 laptop). > > I am trying to follow the first example shown here: > http://www.jsoftware.com/jwiki/Studio/Viewmat > > Accordingly I entered the following commpands: > > require 'viewmat' > hp=: 3 : '(|.,]) 1 (0 _2 _2 ,&.> _2 _1 0 + #y) } (,.|:) y' > MG=: 256 #. 128 0 128,:0 192 0 > viewrgb 2 ([ # #"1) MG {~ hp ^:6 [ 0, 0 1 0 ,: 0 > > I get the following error message: > > |control error: create__w > | create__w x > > Can anyone help me understand what's gone wrong here? > > Thanks, > Jeremy > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
