Can anyone tell me why this: "set the behavior of image id 1727 to button id 1721 of stack “mySillyStack”" does not work! i.e. it empties the behavior of image id 1727 Yet, I can paste: "button id 1721 of stack “mySillyStack”" into the behavior of image id 1727 and it works??? I’m using LC Community 6.6.5 on Mac OS X 10.10.5 Thanks, Roger