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out of date.
SYS1816
SYS1816Explanation
The batch file that was running cannot be found or has been deleted.
Action
Replace or reconstruct the batch file and retry the command.