Dear List, we have a database with 268 bibliographic records, containing descriptions for newspapers, journals and yearbooks. For the Koha version: 21.11.05.000, in the "Advanced Search" mode in the "Search for" fields, selecting the "Subject" field as a - newspaper; - then using Boolean operator "OR" adding the second "Subject" field as a "Journal" - then using Boolean operator "OR" adding the third "Subject" field as a "Yearbook" the system is returning all 268 bibl. records. After upgrading to the Koha version: 25.05.06.000, and repeating the same search, the system is returning: No results found!" You did not specify any search criteria. Return to the last advanced search Error: Can't call method "raw" on an undefined value at /usr/share/koha/lib/C4/Search.pm line 785." Is this a version bug? Any ideas Thanks, Erlanda