I made a restore from a database without tsearch2 installed, installed tsearch2 executing tsearch2.sql and than used it successfully. One day after this i obtained that error as if a database corruption occurred...however noone has touched the database... Thanks for the answers John slave -- View this message in context: http://www.nabble.com/Tsearch2-cache-lookup-problem-t1246642.html#a3322653 Sent from the PostgreSQL - general forum at Nabble.com.