i think the problem is Lockfile = /var/lock/koha/zebradb/rebuild/rebuild..LCK how to unloack that file sudo -u koha misc/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 Lockfile = /var/lock/koha/zebradb/rebuild/rebuild..LCK BIBLIONUMBER in : 999$c BIBLIOITEMNUMBER in : 999$d ================================ skipping authorities ==================== exporting biblio ==================== Records exported: 0 ==================== REINDEXING zebra ==================== ==================== CLEANING ==================== -- regina