[MARIANA LOQUITA]

hello,
i am doing my thesis in Ansys flunet 14.5. i made mesh and now i am at the step 3, set up-solution.
my case is sub-marine in the sea. i am doing that like i have open channel
input data are
based pressure,
time steady,
velocity formulation absolute,
multiphase-volume of fluid,
vuscous-realizable k-e,
materials--> water and air,
2 phases,
input-mass flow rate--> mixture, but i chose before in air and water the numbers that i wanted,
outlet-pressure outlet,
solution methods-scheme-coupled,
solution intilazaration-open channel initialization method-->flat
and run calculation.
the errors that i have are:

Divergence detected - temporarily relaxing and trying again...

Divergence detected in AMG solver: pressure coupled

Primitive Error at Node 1: floating point exception

Error: floating point exception
Error Object: #f
as you understand i don't know where is the problem.
Can you help me???