Hello friends, I'm running koha for the last one year and recently upgraded to 2.2.3. As it requires PDF::API2, I have installed the version 0.44 (the latest available version). But it is not working. Then I came to know the version dependency of barcode.pl of koha 2.2.3. It requires a bit older one 0.3r77. I downloaded the required one. But the question is how to uninstall the previous one i,e, 0.44 from site_perl. Is it necessary to uninstall 0.44 before installation of 0.3r77? P S Mukhopadhyay Lecturer, Deptt. of LIb. & Inf. Sc, Vidyasagar University, W.B., India -- India.com free e-mail - www.india.com. Check out our value-added Premium features, such as an extra 20MB for mail storage, POP3, e-mail forwarding, and ads-free mailboxes!