Error while exporting data

Question

i get the following error while exporting data evn after running catexp.sql
EXP-00056: ORACLE error 31600 encountered
ORA-31600: invalid input value EMIT_SCHEMA for parameter NAME in function SET_TRANSFORM_PARAM
ORA-06512: at "SYS.DBMS_SYS_ERROR", line 105
ORA-06512: at "SYS.DBMS_METADATA_INT", line 3926
ORA-06512: at "SYS.DBMS_METADATA_INT", line 4050
ORA-06512: at "SYS.DBMS_METADATA", line 836
ORA-06512: at line 1
can anyone help me on this

Answer 1

copy past from the notes referred above -
Symptom(s)
~~~~~~~~~~
You are performing a database export against your 9.2 database. The database
export abnormally ends with the following errors:
EXP-00056: ORACLE error 31600 encountered
ORA-31600: invalid input value EMIT_SCHEMA for parameter NAME in function
SET_TRANSFORM_PARAM
ORA-06512: at "SYS.DBMS_SYS_ERROR", line 105
ORA-06512: at "SYS.DBMS_METADATA_INT", line 3926
ORA-06512: at "SYS.DBMS_METADATA_INT", line 4050
ORA-06512: at "SYS.DBMS_METADATA", line 836
ORA-06512: at line 1
EXP-00000: Export terminated unsuccessfully
Change(s)
~~~~~~~~~~
One of the known causes for the error above is that a patchset was recently
applied to the database but one or more of the patchset steps were not
performed.
Cause
~~~~~~~
View the readme notes for the patchset recently installed. You will see a step
that should have been performed that directs you to run the script named
catpatch.sql. Very likely this step was never performed.
Fix
~~~~
As the sysdba user run the catpatch.sql script found in the directory named
$ORACLE_HOME/rdbms/admin. Before you submit this script, view it's contents.
You may see that this script places the database in restricted mode.
rgds