in the function get_gtin14_checkdigit() you use a variable called $gtin14, that doesn't exist. $this->gtin14 does. Maybe you forgot the $this-> part. Quick fix is above the
Keith Nunn - 2009-11-19 20:17:57 - In reply to message 1 from Kieran P
Thanks for catching that. Sorry I didn't see your post, but I'm rarely here and the site doesn't seem to notify me of posts in the support forum. I've made a fix and will upload shortly.