[CutyTeemo]

Hello

I made transient pipe model as below

■ Type
- Transient(Total time 1s, Timestep 0.01s)

■ Fluid model
- 2 Fluid pair model(air and water)

■ Boundary condtion
- 1 inlet(opening, cart vel 1m/s, Xwater=0.8/Xair=0.2)
- 1 outlet(opening, opening pres. and dirn 0 Pa)
- 1 conditional connection(pressure condition) at middle point.

■ Initial condtion : 0 Pa, 0 m/s and Xair=1

But when I start solver, it is stopped by overflow at FIRST step.
Please help me );