I have installed the Product Matrix to my Magento store and i am having trouble making the "shipping group" extra work with my store. Everything seems to be correctly set-up in the admin and CSV.
If i place the shipping group name into the CSV that shipping wont work and states an error on my one page checkout. However if i remove this and simply place a * in this column the shipping file works fine with my website?
This is a Extension created by another company than Magento itself. Therefor this question must be redirected to the developer of the shop since its not a magento problem where the magento core is the error, but probably a bug in the extension or something else causing this problem.
Drop us a mail at WebShopApps. All paid extensions are supported. Sounds like a config issue.