error while running the software
 

Hi,
I am trying to model propulsion system of a MAV in STAR-CCM+, and while running the simulation after providing all the Initial conditions and B.C's, i am getting error like "NULL/FLOATING POINT EXCEPTION---(divided by zero)". How m i supposed to know that what is the reason behind this error. Can anyone suggest me some proper method to resolve these errors.

It is really important because i m falling behind my deadline for my B.Tech project.

Thanks