Export Problem

I am getting this error while exporting. METALNK says that you haverecently
upgraded yr DB and run catpatch.sql.
 we hanvent upgraded out DB, is it safe to run catpatch.sql ?
 About to export specified users ...
. exporting pre-schema procedural objects and actions
. exporting foreign function library names for user SYSADM
. exporting PUBLIC type synonyms
. exporting private type synonyms
. exporting object type definitions for user SYSADM
About to export SYSADM's objects ...
. exporting database links
. exporting sequence numbers
. exporting cluster definitions
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

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