Oracle Solution for Error ora-28580

ORA-28580: recursive external procedures are not supported

What triggered the Error:

callback from within a user's 3GL routine resulted in the invocation of another external procedure.

What should we do to fix it:

ke sure that the SQL code executed in a callback does not directly call another external procedure, or indirectly results in another external procedure, such as triggers calling external procedures, PL/SQL procedures calling external procedures, etc.