How to get rid of #2038 error in a flex iphone app

Question

I have created an flex mobile app in which I want to save a file in pdf format in an ipad/iphone (any IOS device) but while saving that file its throughing #2038 error. And another thing I don't want to save the pdf file in applicationStorageDirectory, because after saving the file I want use that pdf file. Here is my code.
var file:File = File.documentDirectory.resolvePath("indicators.pdf");
if (file.exists)
file.deleteFile(); //delete it if exists
//create a file stream to be able to write the content of the file   
var fileStream:FileStream = new FileStream();
var popUpPage:AlertPage = new AlertPage();
try
//open the file stream and set for Write
fileStream.open(file, FileMode.WRITE);
//writes the bytes
fileStream.writeBytes(pdfBytes, 0, pdfBytes.length);
//close the stream
fileStream.close();
PopUpManager.addPopUp(popUpPage,this,true);
popUpPage.lblAlert.text = "indicator saved in pdf format = "+ file.nativePath;
PopUpManager.centerPopUp(popUpPage);
this.visible = false;
catch(err :Error)
PopUpManager.addPopUp(popUpPage,this,true);
popUpPage.lblAlert.text = err.message + "  "+ file.nativePath;
PopUpManager.centerPopUp(popUpPage);

Answer 1

This doesn't look like a problem with Acrobat forms.