ORA-04155
Unable to convert database string value to MLE string value. Reason: string
Cause
A type conversion from a database value (SQL or PL/SQL) to a Multilingual Engine (MLE) value failed. This can occur if the input database value does not fit the supported range of values for the MLE target type.
Action
Ensure that the database input value fits the supported range of values for the MLE target type.