Issue reported on BI Forum: http://forums.bistudio.com/showthread.php?191458-setWaypointType-quot-FOLLOW-quot-works-in-editor-but-not-in-script
Possible confirmation that it is an issue: http://forums.bistudio.com/showthread.php?191458-setWaypointType-quot-FOLLOW-quot-works-in-editor-but-not-in-script&p=2932909&viewfull=1#post2932909