Because such errors can occur in error handlers, it is important to keep error-handling routines simple and to visually check the code for possible mistakes. From within the error handler, you could invoke other procedures that contain error handling. This method does provide error handling for your error handler, but it isn’t very practical. After all, the more redundant code you add to your error-handling routines, the greater the possibility of runtime errors. The best way is to be extra careful when creating error handlers.