Toad
User uses 'Explain Plan' in the Kill/trace option and gets a message 'Objects referenced in this sql may not be available to the current user' . Looking at the sql monitor for Toad back ground sql, an Oracle error occurred: 942 (ORA-00942: table or view does not exist).
Use the Toad Sql Monitor to see which table has not been correctly prefixed with the correct schema name and prefix the table_name with schema-owner .