Trouble with Rotation Expression

Question

Hi, I'm having trouble with the error: "Undefined value used in expression (could be an out of range array subject?) on line 1.

Here's the expression:

m = index-2;

d = thisComp.layer("Controller").effect("Delay")("Slider");

x = thisComp.layer("Shape Layer 200").transform.xRotation.valueAtTime(time-d*m);

[x[0]]

new to expressions and so i'm not sure what i do and don't need. I'm basically following the rotation of the shape layer above with a slight delay from the "Controller" slider.

I've used index -2 as I will be copying this do the layers below so that they are offset a little more each time.

Thanks for any and all help.

Kyle Hamrick · Answer

Rotation only has one value, so you can kill the [0] in that last line.

Honestly, you don't really need the last line at all, and could just remove the variable from the third line and use that as your actual function.

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