argument to FUNCTION INTEGER-OF-DATE out of bounds

  Explanation: Function argument must be an integer of the form
  YYYYMMDD.  One or more of these rules were violated:

    a. YYYY must be greater than 1600 and less than or equal to
       9999

    b. MM must be in the range of 1 through 12.

    c. DD  must be in  the range of  1 through 31 and valid for
       the particular month and year combination.

  User Action:   If this is not the desired result, modify the
  source  program  to  ensure a  valid  argument  or avoid the
  function with an invalid argument.