expression in AND, OR, or NOT was not a Boolean

  Explanation:  The Boolean evaluator was processing an expression
  or  subexpression  of  the form "A AND B", "A OR B", or "NOT A".
  Either the "A" or the "B" expression was not in the proper form.
  The  correct forms are "NOT X", "X EQ Y", "X NE Y", "X LT Y", "X
  GT Y", "X LE Y", "X GE Y", "X CONTAINS Y",  or  "X  MATCHES  Y".
  The  operand  of  NOT, and both sides of AND and OR expressions,
  must be Boolean expressions.

  User Action:  Rewrite the expression to have the proper format.