No currently active form (ERR: 431)

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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

■ Since no form has the focus, the ActiveForm property
  reference has no effect.
 
■ Possible solution:
 
  • Use the SETFOCUS method to set the focus to a specified
    object.
 
■ If you need additional help, move the cursor to a keyword
  and press F1 to open the Help window.