repository backup warning message

[gokartracer]

When backing up my repository I get this message:

EXP-00008: ORACLE error 6550 encountered
ORA-06550: line 1, column 13:
PLS-00201: identifier 'SYS.LT_EXPORT_PKG' must be declared
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored
EXP-00083: The previous problem occurred when calling SYS.LT_EXPORT_PKG.schema_info_exp
. exporting statistics
Export terminated successfully with warnings.


What does it mean, or where can I find information about it? After the backup up I tried to import the .dmp file back into the repository with abnormal termination.

Thanks,

Larry