I am using a small network for valve control problem. My aim is to control PRV valve (link 9) with a 6 hr time interval and I want to check it’s effect on the total inflow to the system. I have emitters entered to each node. Results show that the pressure in the control node 8 is limited to the desired amount however, the total inflow in the system is not working as I expected. The second 6 hr interval is from clocktime 6 to 11 and it is changing in the 12th hour. But the total inflow amount for 12th hour is same with the previous time interval although it should be same with the hours from 13-17:00. Can you help me to find what might be causing this problem?