Reg:Export backup failed

 Hi Team,

Please any one can suggest what is the solution for below probelm.

My database is running on 11.2.0.3 but when i start expdp and backup failed with below error.

ORA-39126: Worker unexpected fatal error in KUPW$WORKER.FETCH_XML_OBJECTS [PROCACT_SCHEMA:"B15672"]

ORA-19051: Cannot use fast path insert for this XMLType table

ORA-06512: at "SYS.DBMS_SYS_ERROR", line 95

ORA-06512: at "SYS.KUPW$WORKER", line 9001

----- PL/SQL Call Stack -----

  object      line  object

  handle    number  name

700000085770460     20462  package body SYS.KUPW$WORKER

700000085770460      9028  package body SYS.KUPW$WORKER

700000085770460     10935  package body SYS.KUPW$WORKER

700000085770460      2728  package body SYS.KUPW$WORKER

700000085770460      9697  package body SYS.KUPW$WORKER