Hi --"Form over" blitting rule is not used much in Morphic anymore.Here are is something you can try to see if it crashes in Morphic:HandMorph showEvents: false. "Still uses Form over"Here are some things you can do to use another blitting rule in MVC:TextConstants at: #DefaultRule put: Form blend. "was: Form over"Maybe this stops the crashes. :-) Please report back.Best,Marcel