So removing 'System-Object Storage' didn't work. I did:

ScriptLoader new deletePackageNamed: 'System-Object Storage'.

Now the MCWorkingCopy is removed (I don't see the package in Monticello Browser), but I can still browse the class DataStream, and the package is available from Nautilus.

Now if I do:

RPackageOrganizer� default unregisterPackageNamed: #'System-Object Storage'

I don't see the package in Nautilus, but the class "DataStream" is still alive. I can do "DataStream name -> #DataStream" ..et...when I browse it with Nautilus I don't see the class but the category _UnpackagedPackage..

so...how the hell can I remove this package and class from everywhere in the system?

thanks

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Mariano
http://marianopeck.wordpress.com