EPANET 2 Extended Period Model Error

[airforjoey]

Hello fellow civil engineers,

I have this hydraulic model on EPANET 2 (see attachment). It's a pressurized water distribution system with a well, well pump, two booster pumps, one storage tank, one pressurized tank and distribution line. This is a extended period model with simple control. After I run it, it gives me the error as shown in the picture below.

A few reasons that I think might be a. The simple control is not well-written. Maybe I should change to rule-based control.
b. The demand pattern that I create is not accurate. I used this standard day demand I saw it on YouTube.

Let me know if you need more details.
I really appreciate your help
Thanks
Joey

 

[77JQX]

So what's link 6? Is it part of the simple control, or does it connect to a tank? I think EPAnet will close a link if the tank it connects to reaches its minimum or maximum level.

 

[airforjoey]

Yeah, link 6 is connected to the pressurized tank. So do I just change the dimension of the pressurized tank till it works?

Thanks for replying
Joey

 

[77JQX]

I think it's preferable to change the controls so the tank never gets to completely full or empty. This will probably require some buffer between the control on/off settings and the tank full/empty levels.