Expression disabled error !!

[manjunathk23388540]

//The below script creates jiggle for keyframes in any property but sometimes

//results in attached error

//Can someone please help me with this

Thanks

n = 0;

if (numKeys > 0){

  n = nearestKey(time).index;

  if (key(n).time > time){

  n--;

  }

}

if (n == 0){

t = 0;

}else{

t = time - key(n).time;

}

if (n > 0){

v = velocityAtTime(key(n).time - thisComp.frameDuration/10);

amp = .05;

freq = 2.0;

decay = 5.0;

value + v*amp*Math.sin(freq*t*2*Math.PI)/Math.exp(decay*t);

}else{

value;

}

Thanks in advance !!

[Mylenium]

And what specifically are you asking? From a quick glance I'd simply say the loop decrements to zero if there are less than two keyframes. Unlike arrays, keyframe indices start at 1. Once you introduce the wrong index, of course all consecutive calculations will fail.

Mylenium

[Dan Ebberts · Accepted solution]

Does your comp have a long duration between keyframes (or after the last keyframe)? If so, you might need to limit the "t" variable so that Math.exp doesn't overflow. Try changing this line:

t = time - key(n).time;

to this:

t = Math.min(time - key(n).time,10);

Dan