Suggested change by JawhnL5

direct/src/motiontrail/MotionTrail.py

@@ -4,6 +4,7 @@ from panda3d.core import *
 from panda3d.direct import *
 from direct.task import Task
 from direct.showbase.DirectObject import DirectObject
+from direct.directnotify.DirectNotifyGlobal import directNotify
 
 
 def remove_task ( ):