first, you create two object: one sphere one box
open the expressions editor as always
key "box_rotate" as the expression name, then select sphere and paste "pSphere1.translateZ" in the expression Input box， what am i doing is make the box rotateX by move the sphere at Z
and then, i try to select the box, you see, the expressions gone, nothing in there
so, by this situation, i always open a notepad as i use expressions editor, every step, I copy the attributes which I want in to notepad, at last, copy all the expressions back to the expressions editor and then key the expression's name, click "Create"
is there any upgrade software can fix it?