When running external script by scheduler. The solution:
chown root $ORACLE_HOME/bin/extjob chmod 4750 $ORACLE_HOME/bin/extjob chown root $ORACLE_HOME/rdbms/admin/externaljob.ora chmod 640 $ORACLE_HOME/rdbms/admin/externaljob.ora chown root $ORACLE_HOME/bin/jssu chmod 4750 $ORACLE_HOME/bin/jssu
Have a nice week!
Matheus.