Error when Executing DBMS_STATS.GATHER_SCHEMA_STATS

Hi, I'm trying to execute the procedure for statistics,

begin

        DBMS_STATS.GATHER_SCHEMA_STATS (

         OWNNAME => 'MP11VAL',

         cascade => TRUE,

         ESTIMATE_PERCENT => 100);

end;

but I get the following error.

ERROR at line 1:

ORA-00603: ORACLE server session terminated by fatal error

ORA-24557: error 600 encountered while handling error 600; exiting server process

ORA-00600: internal error code, arguments: [kghfrh:ds], [0x022D20258], [], [],

[], [], [], [], [], [], [], []

ORA-00600: internal error code, arguments: [kghfrh:ds], [0x022D20258], [], [],

[], [], [], [], [], [], [], []

Identificador de Proceso: 11884

Identificador de Sesi¾n: 21 N·mero de Serie: 403

is there any suggestion to solve this issue?

thanks a lot.

Martin.-