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out of date.
SYS1437
SYS1437Explanation
No more files can be added to the spool directory.
Action
Remove some files from the spool directory. Then retry the command.