When you started DrRacket, had you opened a file that uses either one
of the #lang scribble variants or an at-exp before opening the
I believe that if you don't do that before opening the preferences
dialog the first time, you can work around this error.
On Sat, Apr 29, 2017 at 1:36 PM, Philip McGrath
> After upgrading to 6.9, I'm getting the following "DrRacket Internal Error"
> when I try to open the preferences menu on MacOS:
> preferences:get: tried to get a preference but no default set for
> v6.9/share/pkgs/gui-lib/framework/preferences.rkt:93:0: preferences:get
> v6.9/share/pkgs/gui-lib/framework/private/preferences.rkt:243:2: show-dialog
> /Applications/Racket v6.9/share/pkgs/gui-lib/mred/private/app.rkt:67:21
> Is this a problem with my setup, or with DrRacket?
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