DBFNDX/1020  Data type error

     Explanation:  The value assigned to a FIELD variable was of the
     wrong type.

     Action:  Correct the program.  If assigning a FIELD variable is from
     some other variable, make sure the other variable has been initialized
     (i.e., is not NIL).

     See Also:  "Basic Concepts" chapter in the Programming and Utilities
     Guide