Greetings, I've been told it's considered near-sacrilegy, but I would like to write a patch for Koha that allows staff to circulate items by callnumber. AFAICT it's only possible to do so using the item barcode, which might be a problem for items migrated from ILS that didn't allow/weren't used to store barcodes for each item, or simply for items that don't have barcodes and circulate. I modified the template and the circulation.pl script in order to handle an additional callnumber variable, and then I went on to modify issuebook and canbookbeissued from Circ2.pm, including the SQL query for the item information. However, I keep getting EXPIRED and NO_MORE_RENEWALS error messages and of course the item does not get circulated. I also think this might not be the right way, and maybe somebody else can provide some pointers on the expected behavior and what you do in these cases. Jose