See the open() function.

I am trying to use the open() function to open a xxx.bat file, but the function is not working with any file, should I set some permission or something like that? Take a look at this code, the text "Opening Process" is displayed but the file is not open :(

void setup() {
  size(200, 200);
}

void draw() {

}

void mousePressed() {
  println("Opening Process");
  open("xxx.bat");
}

Some extra information: If I enter a path with an "M" for example   open("oldMusicx.bat"); I receive this error: Unexpected char 'M'  :S


I also tryied with this saving the file in the same folder I have my sketch:

void mousePressed() {
  try {
  String myscript = "xxx.bat";
  Runtime rt = Runtime.getRuntime();
  Process pr = rt.exec(myscript);
  println("Opening Process_4");
  }
  catch (IOException e) {
  e.printStackTrace();
  }
 
}

And I obtaint a Java error which says:

java.io.IOException: Cannot run program "xxx.bat": CreateProcess error=2, The sistem cannot find the specified file

I solved it calling the entire path and using double \\ instead of one \ 
:) thank you

C:/foo/bar.bat also works in Windows and is nicer than these double anti-slashes...