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out of date.
Element Not Defined
A user-defined type element is referenced but not defined.
For example, if the user-defined type MYTYPE contained
elements A, B, and C, then an attempt to use the variable D
as an element of MYTYPE would cause this message to appear.