I created several snapshots to make an animation with in Creo Parametric. I created the key frame sequence, but when I try to play the animation I keep getting the following error "Key frame sequence Kfs1 invalidated and will be ignored." What does this mean? How did I get an invalidated key frame sequence and how can I correct it? Has anyone had this problem before? I am not sure where to start because I did the process exactly as I have before, and it worked previously.
Setting all the bodies to desired resolved the issue. Don't know why the bodies can't be unspecified or required on this animation though.
duplicate thread - see How to fix an invalidated key frame sequence in Creo Parametric animation? also under main community PTC Creo
(anyway, thanks for adding the answer)