Hello all! After enabling search for non-Roman scripts in our instances, as detailed at https://wiki.koha-community.org/wiki/ICU_chains_configuration, I needed to rebuild the index. Our production and test systems run Koha 22.05.10 on Debian 11. As the process was running, the following message was displayed 6 times: "Use of uninitialized value $sub6 in pattern match (m//) at /usr/share/koha/lib/Koha/Filter/MARC/Index880InZebra.pm line 77." - What does this indicate? (I mean, beyond the obvious.) - Is it something that we should track down and correct? - How can we identify the bibliographic records that trigger the notice? There are no log entries that I can find with details about the records causing the message. Thank you in advance for your attention and help! David Liddle IT Manager david.liddle@wycliff.de (just not for this list) Wycliff e.V., https://wycliff.de Seminar für Sprache und Kultur, https://spracheundkultur.org Internationales Tagungszentrum Karimu, https://karimu.de