Quick Export then Close Doc Script help

Maybe Im not explaining right..

newFile = new File ("Z:/Luke/Batch Processing/Batch Phones/01 - Cases.psb");

open (newFile);

opens my .psb - that contains lot of artboard

The Phones are the smart objects that after the .psb opens automatically update

var idplacedLayerUpdateAllModified = stringIDToTypeID( "placedLayerUpdateAllModified" );

executeAction( idplacedLayerUpdateAllModified, undefined, DialogModes.NO );

then after the update, photoshop saves all the artboard as .jpgs to a folder i've picked

quick_export_png(activeDocument.path.fsName, true); 

    function quick_export_png(path, layer) 

        { 

        try 

            { 

            if (layer == undefined) layer = false;     

            var d = new ActionDescriptor(); 

            var r = new ActionReference(); 

            r.putEnumerated(stringIDToTypeID("layer"), stringIDToTypeID("ordinal"), stringIDToTypeID("targetEnum")); 

            d.putReference(stringIDToTypeID("null"), r); 

            d.putString(stringIDToTypeID("fileType"), "jpg"); 

            d.putInteger(stringIDToTypeID("quality"), 32); 

            d.putInteger(stringIDToTypeID("metadata"), 0); 

            d.putString(stringIDToTypeID("destFolder"), "Z:/Luke/Batch Final"); 

            d.putBoolean(stringIDToTypeID("sRGB"), true); 

            d.putBoolean(stringIDToTypeID("openWindow"), false);

            executeAction(stringIDToTypeID(layer?"exportSelectionAsFileTypePressed":"exportDocumentAsFileTypePressed"), d, DialogModes.NO); 

            } 

        catch (e) { throw(e); } 

        } 

the same as it would if you hit File>Export>Quick Export As..

when i add a line after this telling photoshop to close the document, it opens, updates smart objects, then closes before the export happens, its like it jump past the export stage or closes before the export happens

Many thanks

Luke