Handling Run-Time Errors

This section contains information on the following topics:

• Default Run-Time Error Processing, which describes the message format and values returned at program termination.
• Methods of Handling Errors, which describes using the END, EOR, and ERR I/O statement branch specifiers and the IOSTAT specifier.
• Locating Run-Time Errors, which describes suggested compiler options and information about debugging exceptions.
• Using Traceback Information, which describes techniques to help you locate the cause of severe run-time errors.
• Obtaining Traceback Information with TRACEBACKQQ, which explains how to call a routine to obtain traceback information from your application.
• Run-Time Environment Variables, which describes environment variables that allow program continuation under certain conditions, disable the display of certain dialog boxes under certain conditions, and allow just-in-time debugging.

During execution, your program may encounter errors or exception conditions. These conditions can result from any of the following:

• Errors that occur during I/O operations
• Invalid input data
• Argument errors in calls to the mathematical library
• Arithmetic errors
• Other system-detected errors

The Visual Fortran run-time system (Run-Time Library or RTL) generates appropriate messages and takes action to recover from errors whenever possible.

For a description of each Visual Fortran run-time error message, see Run-Time Errors.