ener.hlp (Topic list)
Important Notice
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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.
Disk not ready (ERR: 71)
■ There is no disk is in the disk drive, or the disk-drive
  door is open.
 
■ Possible solutions:
 
  • Insert a disk in the disk drive.
 
  • Make sure the disk-drive door is closed.
 
■ If you need additional help, move the cursor to a keyword
  and press F1 to open the Help window.