Hi,
I might do something else if i could see the geometry file. However, if you are using a hostart as a previous computation file it is not necessary to indicate initial conditions, ohterwise, if you are prescribing elevations such as 966m, i advise to use a initial condition wich be consecuent with that value (as 966m of depth).
Also, with FV method is not necessary to indicate several keywords you have in your steering file, take a look at the manual.
Not sure whether it helps you to solve your problem or not, but take them as suggestions. If does not, maybe another one could help you more.
Best wishes!
Tschuss!
José