Dear all i try to rebuild zebra i use following command to solve problem Availability: No items available: in opac root@vikas:~# sudo KOHA_CONF=/etc/koha/koha-conf.xml PERL5LIB=/usr/share/koha/lib /usr/share/koha/bin/migration_tools/ rebuild_zebra.pl -b -r -v Zebra configuration information ================================ Zebra biblio directory = /var/lib/koha/zebradb/biblios Zebra authorities directory = /var/lib/koha/zebradb/authorities Koha directory = /usr/share/koha/intranet/cgi-bin BIBLIONUMBER in : 999$c BIBLIOITEMNUMBER in : 999$d ================================ skipping authorities ==================== exporting biblio ==================== 1...............................................................................101.............................................................................201.............................................................................301.............................................................................401.............................................................................501.................... Records exported: 519 ==================== REINDEXING zebra ==================== 10:27:42-23/08 zebraidx(2763) [warn] Unknown register type: ==================== CLEANING Please guide how to solve the error 10:27:42-23/08 zebraidx(2763) [warn] Unknown register type: and remove the error Availability: No items available: in opac Vikas Salunkhe