Hello, I am running my simulation with a type 512 heat exchanger and I get the following warning message (no convergence errors, just warnings) at the end of my simulation (time step: 0.1 hour): *** Warning at time : 39384.000000 Generated by Unit : 45 Generated by Type : 512 Message : Heat exchanger mass balance failed during 112810 time steps. Please check the connections. I do not understand what could be the reason for this. I have gone through my connections and they all seem fine (I do not get this problem with heat exchanger type 91). Thanks for your help, Ciarán ---------------------------------------- Ciarán Flynn Research Scientist Aalto University Department of Energy Technology P.O.Box 14100, 00076 Aalto Otakaari 4, 02150 ESPOO |