Raheem Shaik (IIT KGP)

Actually I did the same simulation with other refrigerant( ethanol ). That worked fine. UDF also correct only.I checked the temp and pressure values just before error occurs, everything looks normal. No sudden change in the values. I am not able to get the reason for the error.  I have put the energy eqn off for some time and run the simulation. When I am keeping energy eqn on, agian i am getting the same error after 1.3 sec of simulation.