Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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     Fatal NMAKE error U1031
 
     filename missing (or macro is null)
 
     An include directive was found, but the name of the file to be
     included was missing, or the macro expanded to nothing.
                                    -♦-