Your problem should be numerical instability.
The denominator consists of dx and dy terms which create instability when meshing is improper. The numerator consists of terms which contains terms like velocity, mass, temperature etc. When the values go beyond a certain limit, it destroys the stability of the system of equations. Another way of loosing the numerical stability is when the continuity, momentum, energy and mass transport equations are solved together, the convergence of one equation depends on the equation above it. There can be convergence problems when all these equations are solved together. In your case, one or more of your values are somewhere outside the limits. Try optimizing your values to get a numerically stable system of equations. I hope this solves your problems... 
I had the same error...
I've changed the Run Mode from MPICH2 Local Parallel to HP MPI Local Parallel and now it's gone See you 
Error message CFX Solver
this error message means a divergance in your solver, mostly cause of bad configurations in your presolver part, some times it happen cause of wrong or bad Boundary Conditions, bad B.C. some times produce zero denominators and make the solver diverge at the begining, my experiance is about Opening BC in CFX, where i chose Opening pressure and Dirn, and in direction part i chose cartesian components, then i entered a direction which was totaly tangent to my Boundary, so when i started the solver, it showed me Code1 or Code 255 as divergance alarm, look at your BC more carefully,
regards, ^_^ 
Fixed the issue
I had this error and was able to fix it....It was caused by antivirus deleting the mpid.exe file from the installation directory. Make sure this file exist there. Thanks.

Wow, that is one evil antivirus you have there.

CFX does not produce .res file when stop the run
Hi to all,
I am having a problem with CFX. When I try to stop run, CFX ends it but does not produce a result file. The problem is that everything goes well, the solution converges, also monitor point Iadded. when I stop the run, I face the warning "the cfx solver for system fluid flow did not produce a results file". I tried to find a solution but could not achieve. By the way, I work on workbench. Any idea? Thanks Best regards 
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