I have a rule as this: IF BO1 WAS REMOVED FROM BO2.List THEN...
This rule works, but if presentation of the list is checkbox list, all the items are selected and the user clicks the checkbox of the caption for unselect all the items, the rule is not fired.
However, if the rule is IF BO1 WAS ADDED TO BO2.List THEN... and the user click the checkbox for select all the list, it works