Maybe this earlier post from Dan will help, also read the before and after via aa advanced search if you have problems, the original poster had pixel aspect problems, here’s the post:
Name: Dan Ebberts
Date: Jul 18, 2005 at 9:21:05 am
Subject: Re: how make object follow path
Here’s one way. Let’s say your layer with the stroked path is called “Stroke Layer”. Copy the mask shape for the path and paste it into the position parameter of your follower layer. This should create keyframes that cause the follower to trace out the path over a 2-second period. Then just add this expression for position to sync it up with the animation of the “End” parameter of the stroke effect:
percent = thisComp.layer(“Stroke Layer”).effect(“Stroke”)(“End”);
valueAtTime(2*percent/100)
Dan