The stored procedure ‘raise_application_error’ was called which causes this error to be generated.
Correct the problem as described in the error message or contact the application administrator or DBA for more information.
The procedure RAISE_APPLICATION_ERROR enables PL/SQL code to issue user-defined ORA- codes with a corresponding custom error message.
The range of ORA code numbers allowed for custom error messages is from ORA-20000 to ORA-20999.
If you are receiving an error in that range, then is it a custom error raised in this way, and the reason/cause will depend entirely on the particular program or package being executed, and the same ORA number may be issued by different applications with a different message for different reasons.