[Newbies] Squeak 4.1 error

[recursive68 at gmail.com]

Thanks for the pointers. Seems it something used by the System Browser, as
it occurring whenever I try to do something with it.

On 27 November 2010 15:56, Casey Ransberger <casey.obrien.r at gmail.com>wrote:

> It looks like you have a nil object that's getting sent the message
> #categories.
>
> If you dive in with the debugger, somewhere near the top, you should be
> able to find your nil object. Nil has a way of begetting nil sometimes, so
> you may need to walk down the stack tract to find original the source of the
> error.
>
> If all else fails, you should be able to recover most if not all of your
> code from your .changes file.
>
> On Nov 27, 2010, at 4:24 AM, <recursive68 at gmail.com>recursive68 at gmail.comwrote:
>
> Hi
>
> I've been using a Squeak 4.1 and Seaside 3.0 and I think I must have
> stuffed something up as now getting the following error:
>
> MessageNotUnderstood: UndefinedObject>>categories
> Proceed
> Abandon
> Debug
> Create
> UndefinedObject(Object)>>doesNotUnderstand: #categories
> Browser>>messageCategoryList
> PluggableListMorphPlus(PluggableListMorph)>>getList
> PluggableListMorphPlus(PluggableListMorph)>>verifyContents
> [] in Browser(Object)>>updateListsAndCodeIn:
> Array(SequenceableCollection)>>do:
> Browser(Object)>>updateListsAndCodeIn:
> Browser(CodeHolder)>>updateListsAndCodeIn:
> Browser(CodeHolder)>>modelWakeUpIn:
> PluggableSystemWindow(SystemWindow)>>activateWindow
> PluggableSystemWindow(SystemWindow)>>activate
> SystemWindow class>>noteTopWindowIn:
> PluggableSystemWindow(SystemWindow)>>delete
> PluggableSystemWindow>>delete
> MorphicToolBuilder>>close:
> Debugger>>debug
> PluggableButtonMorphPlus(PluggableButtonMorph)>>performAction
> PluggableButtonMorphPlus>>performAction
> [] in PluggableButtonMorphPlus(PluggableButtonMorph)>>mouseUp:
> Array(SequenceableCollection)>>do:
>
> UndefinedObject(Object)>>doesNotUnderstand: #categories
> Browser>>messageCategoryList
> PluggableListMorphPlus(PluggableListMorph)>>getList
> PluggableListMorphPlus(PluggableListMorph)>>verifyContents
> [] in Browser(Object)>>updateListsAndCodeIn:
> Array(SequenceableCollection)>>do:
> Browser(Object)>>updateListsAndCodeIn:
> Browser(CodeHolder)>>updateListsAndCodeIn:
> Browser(CodeHolder)>>modelWakeUpIn:
> PluggableSystemWindow(SystemWindow)>>activateWindow
> PluggableSystemWindow(SystemWindow)>>activate
> SystemWindow class>>noteTopWindowIn:
> PluggableSystemWindow(SystemWindow)>>delete
> PluggableSystemWindow>>delete
> MorphicToolBuilder>>close:
> Debugger>>debug
> PluggableButtonMorphPlus(PluggableButtonMorph)>>performAction
> PluggableButtonMorphPlus>>performAction
> [] in PluggableButtonMorphPlus(PluggableButtonMorph)>>mouseUp:
> Array(SequenceableCollection)>>do:
>
> I would just use a new copy of the image but I need to fileout some package
> I've written but this error is stopping me from doing so. Any ideas ?
>
> Thanks
>
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