Hello Fred, Last I wrote I was about to make the changes you suggested, but even after doing so I still had DDC in Details for the cataloged books. However other things came up and I couldn't write back right away, and the next day I had to go on sick leave. I checked Administration > Classification configuration, and I had already set DDC to "No" and UDC to "Yes" for the field "In use". When I went to edit a record, I found that I didn't have the field 080ab in the "Books, booklets, workbooks" MARC framework I'm using, only the 082 DDC field, so there was nothing to map the MARC subfields to. The question now is, how do I add the 080ab field and remove 082? I've seen from messing about in the now gone UNIMARC flavor installation that it wasn't a good idea to delete fields at will because that gets me a 500 error. Best regards Aida Đikić From: library@ssst.edu.ba <library@ssst.edu.ba> Sent: Tuesday, April 18, 2023 1:19 PM To: King, Fred <Fred.King@Medstar.net>; koha@lists.katipo.co.nz Subject: Re: [Koha] Error 500 with dpkg returned an error code (1) Thank you, Fred, I'll try that right away! Best regards Aida Đikić ________________________________ From: King, Fred <Fred.King@Medstar.net<mailto:Fred.King@Medstar.net>> Sent: Monday, April 17, 2023 4:04 PM To: library@ssst.edu.ba<mailto:library@ssst.edu.ba> <library@ssst.edu.ba<mailto:library@ssst.edu.ba>>; koha@lists.katipo.co.nz<mailto:koha@lists.katipo.co.nz> <koha@lists.katipo.co.nz<mailto:koha@lists.katipo.co.nz>> Subject: Re: [Koha] Error 500 with dpkg returned an error code (1)

Alternatively, if I must continue to use the MARC21 flavor, and since by default both the staff interface and OPAC show the DDC classification, is it possible to replace that with UDC?

This part I think I can help you with. UNIMARC, not at all. :-) If you go to Administration --> System preferences --> Cataloging preferences --> Record structure --> itemcallnumber you can choose which MARC subfields will be displayed in the Call Number field. For UDC it would be 080ab. Then go up to Interface --> DefaultClassificationSource and select Universal Decimal Classification. You can add others--my library uses NLM, for example. --Fred Fred King, MSLS, AHIP Medical Librarian, MedStar Washington Hospital Center fred.king@medstar.net<mailto:fred.king@medstar.net> 202-877-6670 ORCID 0000-0001-5266-0279 MedStar Authors Catalog: http://medstarauthors.org I'm thinking about selling my theremin... I haven't touched it in years. --Anon