If u have registered in ASPEN HYSYS support center then you will get solution.So, Request you to register & follow below solution ID.Refer solution ID - Solution ID: 131574 Improved in HYSYS V7.3 - Tray and packed column hydraulics, including export to Koch-Glitsch's KG-Tower and FRI's DRP design / rating programs.I think this will help u to resolve your probelm.
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