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out of date.
SYS1780
SYS1780Explanation
The PRINT command received a return code it did not understand.
Action
Retry the command, if the error occurs again it may be necessary to
reconfigure the Presentation Manager control panel and restart the system.