Created attachment 10359 [details] Software error at Biblio.pm line 2919 When we are trying to checkout/checkin an item an error prompts like this "Can't call method "subfield" on an undefined value at /usr/share/koha/lib/C4/Biblio.pm line 2919. I have this in my url address: "192...:8080/cgi-bin/koha/reserved/renewscript.pl"
This is almost certainly the result of a corrupted MARC record in your database, and not a problem with Koha itself. I'd recommend you pinpoint your problem record and re-catalog it.