[cyleigh]

Rob, thank you. Sorry for the delay in replies, but I only work two days a week, and have a two year old the rest of the time who doesn't leave much head space for applescript!

I had, thankfully, worked out the try-catch situation, but thought that there must have been a better way to deal with the situation. I did wonder if it was a bug, because occasionally, the script doesn't crash - the group check does return missing value. I don't have a use case to show this though.

I have reported this.