Strange behavior function Document.exportFile()

Question

My script uses the exportFile to get files PDF. Usually this is a fairly lengthy process.
When you run the script sometimes disappear from the exported files attached pictures PDF. If at the time of export of the user presses any key on the keyboard is a strange case. From this point on the attached PDF-images disappear from the resulting exported PDF. The same thing occurs during the print to PostScript file.
I wrote a little sketch showing the problem. You can download it here: http://zalil.ru/34525491
Is not there a way to avoid this?

Answer 1

Laubender wrote:
@enbanat – what kind of method do you use to export to PDF?
1. "exportFile()" //InDesign CS1 (?) and above
or
2. "asynchronousExportFile()" //InDesign CS5 and above
Uwe, thanks for the idea! I will explore a method asynchronousExportFile.
I use a very old script. Age of CS. It has been used for a long time and worked flawlessly. In versions of CS4+ began a strange error associated with typing on the keyboard while exports.
Here is a small script written to demonstrate this.  He demands to him in the same folder was "PDF link.pdf". This file must be bigger than 1 MB.
try {
          var scriptFolder = app.activeSctipt.parent;
} catch (e) {
          var scriptFolder = (new File(e.fileName)).parent;
var linkedFile = new File(scriptFolder.absoluteURI + '/PDF link.pdf');
if (!linkedFile.exists) {
          alert('Error\nFile "PDF link.pdf" not found.');
          exit();
if (linkedFile.length < 777777) {
          alert('Error\nFile "PDF link.pdf" too low. You need to use 1Mb PDF file.');
          exit();
var exportFolder = new Folder(Folder.desktop + "/Extport Tests/" +
          (new Date()).toString().replace(/:/g, '-'));
if (!exportFolder.create()) {
          alert('Error\nCan not create folder ' + File.decode(exportFolder));
          exit();
if (Number(String(app.version).split('.')[0]) < 6) {
          alert('Start PDF export\n' +
                    'Please, type any text on you keyboard for test.\n' +
                    'Press ESC for exit.\n' +
                    'See test files in ' + File.decode(exportFolder));
} else {
          // show dialog;
          var window = new Window('palette', 'test');
          window.alignChildren = 'left';
          window.add('statictext', undefined, 'PDF export started.');
          window.add('statictext', undefined, 'Please, type any text on you keyboard for test.');
          window.add('statictext', undefined, 'Press ESC for exit.');
          window.add('statictext', undefined, 'See test files in ' + File.decode(exportFolder));
// make test document
var document = app.documents.add();
var page = document.pages[0];
// do export
app.pdfExportPreferences.pageRange = '1';
var n = 0, errorsCounter = 0;
while (true) {
          page.place(linkedFile);
          var file = new File(exportFolder.absoluteURI + '/' + ++n + '.pdf');
          document.exportFile(ExportFormat.PDF_TYPE, file, false);
          page.pageItems.everyItem().remove();
          window && window.show();
          $.sleep(111);
          if (file.length < 33333 && errorsCounter++) {
                    alert('Bingo!\nBroken file detected:\n' + file.fsName);
                    exportFolder.execute();
                    exit();