[DerekM]

It's failing due to the inherited styles you have applied to entries on those two columns. I'm not sure why off-hand but I didn't do anything to account for styles when I wrote the script so it's not too surprising. It's unlikely this is an easy fix so I'll have to get back to you later, sorry.

If you want to use the script now, you can either remove the styles from those entries, or remove the styles themselves then save and reopen the file.