[Aris Melachroinos]

It is not but thank you for your suggestion.
I copied the layers to another composition and it worked there, so it must be a bug.

[Aris Melachroinos]

Thank you a lot for your answer.
Modifying the last line from [100,100]/Math… to [100,100]*Math… does exactly what I want.

Do you happen to have any link so I can read about this calculation to understand it a bit better?

[Aris Melachroinos]

Nevermind, I found the cause.
I had enabled the setting: Settings -> Navigation -> Trackball Rotation
Turning that feature off fixed the issue.

[Aris Melachroinos]

I have the same issue. Did you manage to find a solution?

[Aris Melachroinos]

Hi Scott,

I am not sure if I fully understood your whole project (I am not sure if/why you need a slider) but if you want to just rename the layers that start with ‘Bar’ from bottom to top, this is a very simple script. You don’t need any slider/expressions to do something like this, but maybe I misunderstood something.

var comp = app.project.activeItem;
var str1 = 'Bar';
var numCounter = 1;
//making a regular expression that starts with str1
var regex = new RegExp("^" + str1);
//looping through all layers from last to first
for (var i = comp.numLayers; i >=1; i--){
    var currentLayer = comp.layer(i);
    var currentName = currentLayer.name;
    if(currentName.match(regex)==str1){
        //this layer name starts with str1
        currentLayer.name = str1 + " " + numCounter;
        numCounter++;
    }
}