An error occurred during Oracle Export and encountered Oracle error 19206____oracle

The following error occurred while entering exp in the DOS environment.


. Exporting Pre-schema process objects and actions
. Exporting external function library names for user Fjzyinfo
. Export public type synonyms
. Exporting private type synonyms
. Exporting user Fjzyinfo Object type definitions
About to export Fjzyinfo objects ...
. Exporting database Links
. Exporting ordinal
. Exporting cluster definitions
EXP-00056: ORACLE Error 19206 encountered
ORA-19206: Invalid value for query or REF CURSOR parameter
ORA-06512: In the SYS. Dbms_xmlgen ", line 83
ORA-06512: In the SYS. Dbms_metadata ", line 345
ORA-06512: In the SYS. Dbms_metadata ", line 410
ORA-06512: In the SYS. Dbms_metadata ", line 449
ORA-06512: In the SYS. Dbms_metadata ", line 1156
ORA-06512: In the SYS. Dbms_metadata ", line 1141
ORA-06512: On line 1
EXP-00000: Export termination failed

Solving method

1, in the beginning of the operation of the input cmd
2, Sqlplus/nolog
3, Connect/as SYSDBA
4. @d:/oracle/ora92/rdbms/admin/catmeta.sql//This is the path to the Ca ' t ' me ' ta.sql file
But there may be a problem with this approach, which is that some tables will be lost