After Effects: Javascript - Undefined value used in the expression(Could be out of range array subscript)

user_13528947 0
Viewed 5178

I'm not a programmer by any means. I'm an animator trying to use JS expressions in After Effects. I'm getting an "Undefined value used in expression" error on line 1 where I define a variable.I already showed it to my friend on discord who is a cs major, and he had no clue what was wrong with it.

enter image description here Here's just a paste of the code if you need it:

var count = 1;

if (framesToTime(time) % 12 == 0) {
count = count + 1

    if (count % 2 == 0){
        thisProperty = 95
    } else {
    thisProperty = 20
    };
} ;
after-effects undefined javascript
4 Answers

Ok I don't know why the hell this fixed it, but I changed the name of the variable from "count" to just "x" and it works now. Go figure

user_135289470

Try it.

var count = 1;

if (framesToTime(time) % 12 == 0) {
    count = count + 1;

    if (count % 2 == 0){
        thisProperty = 95;
    } else {
       thisProperty = 20;
    }
}
thisProperty;

In your code, thisProperty has become an ordinary variable. If you write its name at the end of the code, then its value will be assigned to the property.

user_197422140

In AE, if there is nothing inside an if statement or the if statement contains malformed/error code you will receive this error. Put a temp value inside the curly braces or something to process and ensure nothing inside will throw an error.

I also received this error with this:

pastTime = timeToFrames(time)-1;
curPos = transform.xPosition;
pastPos = transform.xPosition.valueAtTime(framesToTime(pastTime));

if (curPos-pastPos[0] != 0) {

// Here is the problem in my case. added a value here 99 to fix until finished testing.

}
else {
        effect("Angle Control")("Angle")
}

if/else statements are strict

user_19657180

I got this error because there was a missing semicolon.

user_115908090
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