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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

SYS1337
 
Explanation
 
A disk error was encountered while CHKDSK with the /F option was attempting
to update the File Allocation Table on the specified drive. The table number
will be 1 or 2, depending on which of the two copies of the File Allocation
Table could not be written.
 
Action
 
If this message appears for both table 1 and 2, format the disk. If FORMAT
fails, the disk is unusable.
 
See Also
 
CHKDSK, FORMAT