One reason can be that there has not been a full garbage collection 
since the objects were unreferenced. Try

Smalltalk garbageCollect

before doing the PointerFinder on: ...

Cheers,
Bob

On 7/12/13 7:22 AM, Vaidotas Didžbalis wrote:
> Hello,
> Not sure whether this is right place for a such a question.
>
> How could this be sometimes PointerFinder is helpful. After loading
> and using parts of Moose (www.moosetechnology.org) in Squeak, I wanted
> to do some housekeeping and try understanding why some objects are not
> garbage collected.
>
> (FAMIXClass allSubInstances first: 20) do: [:e | PointerFinder on: e]
> yields nothing:
> https://www.dropbox.com/s/5izuagj1wto0i69/whoisusingthem.png
>
>
> I run Squeak4.4 update 12327 Cog VM 4.0.0 (release) Apr 4, 2013 on Windows 7.
>
> Thank you in advance,
> Vaidas
>
>

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