thanks. Guess it must be the installation as I'm freezing and thawing on the same setup. Don't have access to the main perl library to update the version of storable in there, so I tried installing it locally and use lib'ing that. Still getting the same error. Does this mean my local version of the module isn't being used (and if so, is there a way of forcing the script to use this version?) or does it mean there's something else wrong?