SO, I am a bit of a noob at after effects, but I am having the same problem: not being able to start/stop expressions at the desired time. After finding this thread, I figured i would give it an ask. I will use the common “wiggle” expression as an expression template. Thi sis waht I have tagged to Position on a null object that is parented to a camera:
beginTime = 4; // start at 4 seconds
endTime = 8;
if (time < beginTime
It returns this error (I have tried with the N.O. as a 3d layer as well as a 2d one).
"expression result must be of dimension 2, not 1"
Any ideas?