Was this in a fresh session? I have experienced that behavior when running the code after other opengl code had been running. In some cases, that was because 'sprog' existed, and represented a shader that I was not prepared to feed. But it's quite possible that there's some other issues where I am assuming a fresh opengl context and that's not what I am working with.
If this was in a fresh session, however, (or, if you are really interested in finding the interaction issue) I might have to ship you a opy with a bunch of debug logging type statements, to determine where it's shutting down. Thanks, -- Raul On Tue, Feb 8, 2022 at 5:22 PM Brian Schott <[email protected]> wrote: > > I just now tried again. > I copied the code from rosettacode.org into the clipboard and then used F8 > key to paste the code. I had done the same last time. But this time J quits > ("unexpectedly") immediately without a graphics window appearing, or if it > does appear, it disappears so fast I could not see it. > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
