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   To add pre-evaluated fields, proceed in the following way:

     . On the pre-evaluated fields list, press the Ins key.

     . The system displays the list of fields of the Lookup file,
       from which to select the fields to be pre-evaluated. Select the
       desired field with the Enter key. In order to build a correct
       expression, the field must be available in both the parent and child
       file. If not, the expression must be built manually by the programmer.

     . Press F10 to confirm the insertion of the new field.