To follow a curved Path You have to "morph-SOE-add" the morphline-path to Your morph-surface an then begin to push - but first push is from somewhere within Your surface to the beginning of the path and then- always stay on the path with the mousecurser.
This is a german Vid but You can follow the steps:
www.youtube.com/watch?hl=de&gl=AT&client=mv-google&v=dZLTB2l4-f0&nomobile=1
AC5.5-AC27EduAut, PC-Win10, MacbookAirM1, MacbookM1Max, Win-I7+Nvidia