Hello all, Can you please let me know if anyone has faced the below similar issue during 64 bit upgrade in 8.1.7.4.0 version? *** SESSION ID:(8.6) 2010-05-07 20:44:11.492 Exception signal: 11 (SIGSEGV), code: 1 (Address not mapped to object), addr: 0x6, REG_PC: 000000010101B700 *** 2010-05-07 20:44:11.553 ksedmp: internal or fatal error ORA-07445: exception encountered: core dump [000000010101B700] [SIGSEGV] [Address not mapped to object] [6] [] [] ORA-21700: object does not exist or is marked for delete ORA-22314: method information mismatch in ALTER TYPE Current SQL statement for this session: insert into "SYS"."KOTTD$" (SYS_NC_OID$, SYS_NC_ROWINFO$) values(:1, :2 ) ----- PL/SQL Call Stack ----- object line object handle number name 3bae1a700 824 package body SYS.DBMS_SYS_SQL 3badecf58 32 package body SYS.DBMS_SQL 3bae89180 70 anonymous block Thanks, Ann