Section 9,2: Run_Time

 Errors that occur during execution of your program are reported by
 diagnostic messages from the Run-Time Library.  These messages can
 result from hardware conditions, file system errors, errors
 detected by the DEC Fortran I/O system, errors that occur during
 transfer of data between the program and an internal record,
 computations that cause overflow or underflow, incorrect calls to
 the Run-Time Library, problems in array descriptions, and
 conditions detected by the operating system.

 Run-Time diagnostic messages have the following format:

   forrtl: severity: message_text

   forrtl:       Identifies the source as the DEC Fortran 
                 Run-Time Library
   severity:     Possibilities: severe, error, warning, or 
                 informational
   message_text: Explains the event that caused the message

Sub-Topics

1. Severe_Messages
2. Error_Messages
3. Warning_Messages
4. Informational_Messages