Document.asynchronousExportFile - can't close document after export

[Dwie_Kropki]

I have this function:

function __exportPdf(doc, file, preset){
    pdfPreset = app.pdfExportPresets.item(preset);        
    // doc.exportFile(ExportFormat.pdfType, file, false, pdfPreset);
    // doc.close(SaveOptions.no);
    __makeListener(doc);
    doc.asynchronousExportFile(ExportFormat.pdfType, file, false, pdfPreset);
}

and this one:

function __makeListener(_d){
    var afterExportListener = _d.eventListeners.itemByName("afterExport");
    if (afterExportListener.isValid) {
        afterExportListener.remove();
    }
    _d.addEventListener("afterExport", function(event) {
        // event parent is document to close
        alert(event.parent);
        event.parent.close(SaveOptions.no);
    }).name = "afterExport";
}

alert fires, but document is still open.

I have a lot of indd files, large and little ones, and i want to open another one when previous one is being exported.
And it works. But I can't close document of file already exported.

[Trevor:]

If you are defining _d as activeDocument or documents[0] then try defining _d as itemByID

_d = app.documents.itemByID(app.documents[0].id);

It might sound silly but give it a go

[Dwie_Kropki]

_d is reference to var DOCUMENT

var DOCUMENT = app.documents.add(true);
/* some code here */
__exportPdf(DOCUMENT, pdfFile, '2017_001');

but I'll try the way you gave