Syntax Error With Expression

I have an expression which is not performing as expected. When I enter the expression I get a syntax message in the syntax box below it. “Unknown parameter name”. I am selecting the parameters (what I think are parameters) from the auto suggestion drop downs provided. How can they be unknown?? Want to eliminate this as reason expression is not working. Many thanks.

expression used: #Last.PositionY#*1/2

Sorry… just realized 3D tweening needs to be off on all objects involved in the expression. Not just the object that is being animated via expression.

Indeed, but of course only when you want to use their position-data.:wink: