That fix seemed to fix it.  It also fixed creating and entering a new
project (which was apparently broken because of TabbedPalette as well).

Thanks,
cbc

On Mon, Nov 20, 2017 at 4:45 PM, David T. Lewis <lewis at mail.msen.com> wrote:

> On Mon, Nov 20, 2017 at 02:50:33PM -0800, Chris Cunningham wrote:
> > object again.  Select Presentation, you get an error while it is trying
> to
> > build the thumbnail for TabbedPalette.  In particular, this line errors
> out:
> > aTab addMorph: (sk := self world drawingClass withForm: aGraphic).
> > self world here returns nil - which obviously doesn't understand
> > #drawingClass.
> >
> > And I am on update 17519 (updated to latest before finding these issues).
> >
> > -cbc
>
> Thanks Chris,
>
> I think I fixed this one. A TabbedPalette is one of several kinds of morph
> that
> does not know its world, so self world was not working as a replacement for
> World.
>
> I see another bug that may be similar in nature. When I open objects(o) and
> then move the ObjectsTool morph around, the mouse pointer gives a red X, so
> possibly another case of assuming that morphs generally know their world,
> when apparently there are quite a few cases where this is not so.
>
> Sorry for introducing these problems, I'll try to make them right as soon
> as I can.
>
> Dave
>
>
>
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