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Question

AFX Script Problem Visual Studio Code

Forum|Forum|4 years ago
July 14, 2021
2 replies
1979 views

Hi,

i recently started scripting and wrote a script in VS Studio for After Effects, which works fine when i run it from Visual Studio. But when i save it and run the script from After Effect it gives me an error message: "unable to execute at line 20..."

which is a function in my script. everything before gets executed.

I have Variables (a,b) in my function because i am looking for several Objects meaning CompItem, FootageItem, Folderitem where I'm looking for specific names as a string.

The Function looks like that:

function graballItems(a, b) {
  var proj, curItem, itemTotal, ItemAry;

  proj = app.project;

  itemTotal = proj.numItems;

  ItemAry = new Array();

  for (var i = 1; i <= itemTotal; i++) {
    curItem = proj.item(i);

    if (curItem instanceof b && curItem.name.indexOf(a) !== -1) {
      ItemAry = curItem;
    }
  }
  return ItemAry;
}

// And i use it like that:

var myCompBeauty = graballItems("CAN_ENDTAG_PRE", CompItem);

But strange though, that it is working from VS Studio.

Does anybody know why the error message appears?

Cheers

Martin

Scripting

This topic has been closed for replies.

Mathias Moehl

Community Expert

The line "ItemAry = new Array()" suggests that you want to return an array of the found items. But in the line

ItemAry = curItem;

you replace your array with a single item.

If you want to grab all items, you most likely want to do

ItemAry.push(curItem)

instead.

Mathias Möhl - Developer of tools like BeatEdit and Automation Blocks for Premiere Pro and After Effects

M

mmueller2Author

Participating Frequently

First of all, thank you both for your quick reply.

I tried to implement the try and catch statement but without any sucess.

I implemented the push item command but recognized that i only need one item not an array so i changed it to just get the curitem. But still the same error.

Last thing i wanted to try to set an alert line by line to check where the code breaks exactly.

Strange enough the script works like that:

function graballItems (a,b){

alert("OK");

var proj,curItem,itemTotal,MyItem;

proj = app.project;

itemTotal = proj.numItems;

for (var i =1; i<= itemTotal; i++){

curItem = proj.item(i);

if (curItem instanceof b && curItem.name.indexOf(a) !== -1 ){

MyItem = curItem;

}

return MyItem;

}

But of course i don't want to have an alert 10 times while the script is running.

M

mmueller2Author

Participating Frequently

If the alert fixes the issue, I suspect that it is some weird timing issue. What happens if you move the alert to a later point in time? Try moving it down one line step by step and see at which point the alert does not help anymore.

Then you know which line causes the trouble.

Also, how do you exactly execute the script in Ae? File->Scripts->Run Script File, or is it a panel, or do you execute it from the command line?

I was currently exactly trying what you mentioned and came to the conclusion that the error must appear in the usage of the function later on.

When i move the alert after the last line it throws an error.

var myCompBeauty = graballItems("CAN_ENDTAG_PRE",CompItem);

alert("OK");

var myCompReflection = graballItems("RB_CAN_ENDTAG_4K",CompItem);

Justin Taylor-Hyper Brew

Community Expert

Just tested and it works for me after commenting out that line. Try putting it in a try catch and see if you can get any more info on the error.

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