ACUSOLVE error in boundary condition

HI,

I am new to ACUSOLVE. I have a flow problem in which I have assigned a pressure inflow and an outflow with mass flux using advanced boundary condition.

When I try to run the solver, I am getting an error stating ' multiple surface integrated condition at outlet'

I don't understand the actual sense of this error since as far as I know, we can simulate a case with an inflow pressure and outflow mass flux. I have done similar cases in ANSYS Fluent.

 

If somebody knows how to rectify this problem, please let me know asap.

 

Thanks in advance.