Hi! We have Koha 3.0, with Marc21 and Nozebra. Unfortunately in many cases our searches (both from intranet or OPAC ) give either no results or errors (Error 404). I have tried to trace the reason examining MYSql tables and found two problems, which to my mind, can lead to this situation: 1. Several records in Nozebra table have empty "biblionumbers" fields. It looks like these indexes are not created.... Not sure - shall I run rebuild_nozebra.pl in cron?? Nightly?? Any documentation for this? 2. Several records in "biblioitems" table have empty "Marcxml" field. Can I delete them manually or this will make other problems? Is this filed used in searching somehow?? Can anybody help me? Thanks in advance! Irakli Irakli Garibashvili (Mr.) Georgian Library Association #7 Gudiashvili Str. Tbilisi, 0107, GEORGIA