ORA-04157
An attempt was made to exchange an invalid property between Multilingual Engine (MLE) and PL/SQL.
Cause
An attempt was made to use an empty string or a NULL value as property_name when importing or exporting values in DBMS_MLE.
Action
Pass a valid property_name that is neither an empty string nor a NULL value. Review the code for occurrences of
- DBMS_MLE.export_to_mle()
- DBMS_MLE.import_from_mle()
For each of these, ensure the property_name meets the requirements mentioned above.