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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.
Invalid object reference (ERR: 420)
■ The object that is referenced is not loaded.
 
■ Possible solution:
 
  • Use the LOAD statement or SHOW method to load the
    specified object before referencing it.
 
■ If you need additional help, move the cursor to a
  keyword and press F1 to open the Help window.