Re: [Pharo-project] UndefinedObject(Object)>>doesNotUnderstand: #findNextHandlerContextStarting

But there is in Behavior:

cleanUp: aggressive "Clean out any caches and other state that should be flushed when trying to get an image into a pristine state. The argument should be used to indicate how aggressive the cleanup should be. Some subclasses may act differently depending on its value - for example, ChangeSet will only delete all unused and reinitialize the current change set if we're asking it to be aggressive."

^self cleanUp

So it calls cleanUp even when you do Smalltlak cleanUp: true.

Now I wonder if we should remove the displayingProgress and do the call to #cleanUp (the non-agressive one) on image save....

yes this could be a good idea. Stef