Yes, it's caused by preferences referencing obsolete classes.
Change
Preferences class >> removePreference: aSymbol
"Remove all memory of the given preference symbol."
self dictionaryOfPreferences removeKey: aSymbol ifAbsent: [].
Parameters removeKey: aSymbol ifAbsent: [].
(Parameters at: #PersonalDictionaryOfPreferences ifAbsent: [])
ifNotNil: [:personalDict | personalDict removeKey: aSymbol ifAbsent: []]
Then evaluate:
Preferences removePreference: #automaticFlapLayout;
removePreference: #navigatorOnLeftEdge;
removePreference: #classicNavigatorEnabled.
And you should be able to save.
Cheers,
Henry
On Nov 23, 2009, at 4:46 17PM, Henrik Jegbjerg Hansen wrote:
> Saving preferences to disk gives an error in latest pharo core. I am on
> Ubuntu Linux with the latest VM.
>
> Any ideas how to fix this?
>
>
> --
> Henrik Jegbjerg Hansen
>
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> [email protected]
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>
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