ORA-07445: exception encountered: core dump [qxopqexc()+136] [SIGSEGV] [Address not mapped to object

Hi Folks ,
need One help ..

while execute the this statment SELECT EXTRACTVALUE(:B1 , XMLTYPE (EXTRACT (:B1 , '/').GETSTRINGVAL ()).GETROOTELEMENT()||'/ABILLITY_REFERENCE') FROM DUAL
via procedure  we are  getting ora:07445 error ORA-07445: exception encountered: core dump [qxopqexc()+136] [SIGSEGV] [Address not mapped to object] [0x000000000] [] []

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