Collect files script not working

//  -- GET PROJECT PATH  --//

function get_ProjectPath(){
    var projectPath = '';
    if (app.project.file != null) {
        projectPath = app.project.file.fsName;
    }
    return projectPath;
}

g_projectPath = get_ProjectPath();

//  -- GET collect_files  --//

    var OPpath = "C:\\Test"
    var originalName = g_projectPath.split("\\").pop();
    var baseName = originalName.substring(0, originalName.lastIndexOf("."));

    function createFolderIfNotExists(folderPath) {
        var folder = new Folder(folderPath);
        if (!folder.exists) {
            folder.create();
        }
    }

    function includes(array, value) {
        for (var i = 0; i < array.length; i++) {
            if (value.indexOf(array[i]) !== -1) {
                return true;
            }
        }
        return false;
    }
function collect_files(target_path) {

    // Create folder if app project do not exits


    var project_dir = target_path.toString() + "/" + baseName;
    createFolderIfNotExists(project_dir);

    var footage_dir = project_dir + "/(Footage)";
    createFolderIfNotExists(footage_dir);


        for (i = 1; i <= app.project.numItems; i++) {
            item = app.project.item(i)

            // Check these before continuing.
            if (item instanceof FootageItem == false) {
                continue
            }
            ;
            if (item.file == null) {
                continue
            }
            ;
            if (item.footageMissing) {
                continue
            }
            ;

            // Get item's extension. Will be used to differentiate between image sequences and other media.
            var item_extension = item.file.name.split('.').pop();
            //alert (item_extension)

            // Make the item's directory if it doesn't exist
            var item_dir = new Folder(footage_dir.toString() + "\\" + item.parentFolder.name);
            createFolderIfNotExists(item_dir);
            alert ("item_dir:" + item_dir.path)

            // Create target dir and target file variables
            var target_dir = new Folder(footage_dir.toString() + "\\" + item.parentFolder.name);
            createFolderIfNotExists(target_dir);
            alert ("target_dir:" + target_dir.path)

            var target_file = new File(target_dir.toString() + "\\" + item.file.name);
            createFolderIfNotExists(target_file);
            //alert ("target_file:" + target_file.name)

            // If the target is a still.
            if (item.mainSource.isStill) {
                item.file.copy(target_dir.absoluteURI + "\\" + item.file.name);
                item.replace(target_file);
                continue
            }

            // list of still image extensions
            var still_extensions = ['jpg', 'jpeg', 'png', 'gif', 'bmp', 'svg', 'webp', 'ico', 'tif', 'tiff', 'eps', 'raw', 'ai', 'ps', 'indd', 'pdf', 'xcf', 'sketch', 'xd', 'cin', 'dpx', 'exr', 'pxr', 'rla', 'hdr', 'tga'];
            var footage_extensions = ['mov', 'avi', 'mpeg', 'mp4', 'wmv', 'flv', 'mkv', 'webm', 'ogg', 'wav', 'mp3', 'aac', 'aiff', 'flac'];

            //If it's a footages sequence.

            if (includes(footage_extensions, item_extension)) {

                item.file.copy(target_dir.toString() + "\\" + item.file.name);
                item.replace(target_file);

            }

            //If it's a image sequence.

            if (includes(still_extensions, item_extension)) {
                var source_folder = item.file.parent;
                var frames = source_folder.getFiles();
                alert("Source folder: " + source_folder.path);
                alert("Number of frames: " + frames.length);

                for (f = 0; f<frames.length; f++){
                    frame = frames[f]
                    frame.copy(target_dir.toString() + "\\" + frame.name)
                }

                try {
                    item.replaceWithSequence(target_file, true)
                } catch (e){
                    alert(item.name)
                }


            }

        }
        app.project.save(new File(project_dir.toString() + "\\" + app.project.file.name));
    }


    collect_files(OPpath); // Call savefile() here