Thanks Brutha. Initially, I was using these, but I have a problem with getSaveFile. If the selected file already exists, it gives a "file exists, overwrite?" warning, which seems impossible to switch off. In my script, if the user selects an existing file, it is because they want their results appending to the existing file, so you can see that this warning was inappropriate and misleading. As I couldn't stop this warning from happening, I had to try something else, which opened up a whole new can of worms ;-)