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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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     EXEHDR error U1100
 
     invalid magic number 'number'
 
     EXEHDR discovered an unknown signature in the header for the file.
 
     The signature in the header for a file gives the operating system
     under which the executable file will run. EXEHDR recognizes
     signatures for DOS and OS/2 only.
                                    -♦-