Apparently when I move the moose from the finder elements (classes) to the model item I get a DNU point:from:
MoprhTreeListManager>>clicked: event inTheCheckboxOf: aTargetMorph | position |
position := aTargetMorph point: event position from: client. ^ self isCheckList and: [ (aTargetMorph checkClickableZone translateBy: 2 @ 0) containsPoint: position ]
Stef