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out of date.
SYS1589
SYS1589Explanation
PATCH could not allocate enough storage to save all the patch information.
Action
Split the patch request into two or more PATCH sessions.