Hello! I realize this is an old thread, but it still seems to be the most relevant.
I tried using the action originally posted at the start of this thread, iTweenMoveTo_v2.cs, but I got the error:
Assets/PlayMaker/Actions/iTweenMoveTo_v2.cs(66,38): error CS0115: `HutongGames.PlayMaker.Actions.iTweenMoveTo_v2.OnDrawGizmos()' is marked as an override but no suitable method found to override
To get to where I could run in game mode, and not being sure what else to do, I commented out lines 66-78. That at least let me run, but I'm not sure what else I might have broken in the process. The object I'm trying to animate, a plane, does follow the path - and that's a relief - but it's not orienting itself along the direction of movement. Not sure if that's related.
Greatly appreciate the custom action, any further help would be most welcome.