AIR NativeProcess on Mac gives Error:3219, all solutions failing

Question

hi guys,
I've read up most solutions for this error and none seem to apply.
I'm running a basic AS3 app in FlashBuilder, on OS-X.
descriptor is set to extendedDesktop
have set the profile in FB to 'extendedDesktop'
am publishing as 'signed native installer'
I've tried launching the file from both:
app:/demo.sh
file:///Users/visualife/Desktop/AE/demo.sh
the target file is set to 777 (executable)
the target file runs fine when directly targetted
i'm running the exe on the same OS and machine it's created on
changing the 'demo.sh' file to a jpg etc doesn't change anything
No matter what I try I get told native process is support, everything runs fine until start is called then a Error: 3219 is thrown with no further information.
all help greatly appreciated!
I've included my code below:
package {
   import flash.desktop.NativeProcess;
   import flash.desktop.NativeProcessStartupInfo;
   import flash.display.Sprite;
   import flash.errors.IllegalOperationError;
   import flash.events.Event;
   import flash.events.IOErrorEvent;
   import flash.events.NativeProcessExitEvent;
   import flash.events.ProgressEvent;
   import flash.filesystem.File;
   import flash.text.TextField;
   public class VauxhallController extends Sprite {
   private var debug_txt:TextField;
   public var process:NativeProcess;
   private var sh:File;
   public function VauxhallController() {
   if (stage) {
  init();
   } else {
   this.addEventListener(Event.ADDED_TO_STAGE, init);
   private function init($e:Event=null):void {
   this.removeEventListener(Event.ADDED_TO_STAGE, init);
  build();
   if (NativeProcess.isSupported) {
  initListeners();
  debugMe("Native process supported");
  go();
   } else {
  debugMe("Native not supported");
   private function build():void {
   // debug
  debug_txt  = new TextField();
  debug_txt.width = 300;
  debug_txt.height= 600;
   this.addChild(debug_txt);
   private function initListeners():void { }
   private function go():void {
  runShellFile();
   private function runShellFile():void {
   var nativeProcessStartupInfo:NativeProcessStartupInfo = new NativeProcessStartupInfo();
   var essArgs:Vector.<String> = new Vector.<String>();  
   var file:File;
  file  = File.desktopDirectory.resolvePath("AE/demo.sh");
  nativeProcessStartupInfo.executable = file;
  nativeProcessStartupInfo.workingDirectory  = File.desktopDirectory;
  nativeProcessStartupInfo.executable = file;
  process = new NativeProcess();
  process.addEventListener(ProgressEvent.STANDARD_OUTPUT_DATA, onOutputData);
  process.addEventListener(ProgressEvent.STANDARD_ERROR_DATA, onErrorData);
  process.addEventListener(NativeProcessExitEvent.EXIT, onExit);
  process.addEventListener(IOErrorEvent.STANDARD_OUTPUT_IO_ERROR, onIOError);
  process.addEventListener(IOErrorEvent.STANDARD_ERROR_IO_ERROR, onIOError);
   try {
  process.start(nativeProcessStartupInfo);
   } catch (error:IllegalOperationError) {
  debugMe(error.toString());
   } catch (error:ArgumentError) {
  debugMe(error.toString());
   } catch (error:Error) {
  debugMe(error.toString());
   public function onOutputData(event:ProgressEvent):void {  debugMe("Got: "+ process.standardOutput.readUTFBytes(process.standardOutput.bytesAvailable));   }
   public function onErrorData(event:ProgressEvent):void {  debugMe("ERROR: "+ process.standardError.readUTFBytes(process.standardError.bytesAvailable));   }
   public function onExit(event:NativeProcessExitEvent):void { debugMe("Process exited with: "+ event.exitCode);   }
   public function onIOError(event:IOErrorEvent):void {  debugMe("IOError: "+ event.toString());   }
   private function debugMe(_str:String):void {  debug_txt.appendText(_str +"\n");   }

Answer 1

Latest Version of Air won't install on my MAC! Help!
Workaround mentioned in this thread by chris.campbell actually fixed same issue for me.