C2009   Invalid use of @ (pass-by-reference) operator

     Explanation:  You applied the pass-by-reference operator (@) to an
     array element or a variable explicitly declared with the FIELD
     statement.  The CA-Clipper runtime system passes both array elements and
     field variables by value in all cases.

     Action:  If you applied the @ operator to a field variable, pass the
     field by value.  Fields have global scope, so there may be no reason to
     pass the field at all.