I am trying to do a simple simulation for a small area with MIKE 21. The model area has two boundaries east and west.  Upstream boundary condition is a water level time series and a constant water level is given at downstream boundary. The model runs but still I am facing few problems.
1. When I increase the US water level than a certain value, it gives an error says “ very high water level, near …..” with abnormal run completion.
2. To eliminate the above problem, I introduce “Sink” option at some grids giving high discharge, but there are no effects to the outputs which I had before introducing sink discharge.
3. Also, I add Precipitation (constant then I tried for a time series), but in this case also I could not find any effects to the results due to the rainfall.
I will be much grateful, if anyone could give some hints on these problems… I have got struck for couple of days due to these problems….
Thank you