>
> 1. User removes the managed object from the existing document (using
> array controller), presses the close window button, changes are not saved.
2. Managed object is removed from the managed object context by the
> frameworks and is no longer reachable by any means that I am aware of.
>
You should eliminate the dependency to the graphics context.
As a quick fix, you could add -delete method in your managed object class,
and make it remove itself from the context. When user removes an object,
invoke the -delete method, and you have an opportunity to do your cleanup.
/Dado
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