Host variable, <str>, not within scope of BEGIN DECLARE and END
  DECLARE section

  Explanation:  Your program referred to a variable that was
  declared outside of the BEGIN DECLARE and END DECLARE
  statements.

  User Action:  Either move the desired host variable declaration
  to be within this section or remove the BEGIN DECLARE and END
  DECLARE statement.  You can also ignore this warning message.
  BEGIN DECLARE and END DECLARE are only for standard complicance.