How to run the model?

I want to model hydrodynamics of a large reservoir. There are no errors and warings of my model after precheck with preW2_ivf.exe. But when i run w2_ivf_MATFOR.exe or w2_ivf.exe, a error messagebox shows at once with no error or warning infomation in w2.err or w2.wrn. No computation happens. I debug the code, the error information is that Unhandled exception in w2_ivf_MATFOR.exe or w2_ivf.exe:0xC0000094:Integer Divide by Zero.I don't know its real meaning, I also cannot solve the prblem. So please give me some help. Thank you.