Mashing Problem?
dear all,
I got this message in cfx 5.4.1 build when i try to mashing. "Zero length stack generated" and then I can not write the diffinition file. But when I run the example such as staticMixer, I don't have this message. dear all, I got this message in cfx launcher when i try to run the solver CFX4  Solver  forrtl: error (72): floating overflow CFX4  Solver  Image PC Routine Line Source CFX4  Solver  psolvempiNT.exe 00687065 Unknown Unknown Unknown CFX4  Solver  psolvempiNT.exe 0062000B Unknown Unknown Unknown CFX4  Solver  psolvempiNT.exe 005BBB86 Unknown Unknown Unknown CFX4  Solver  psolvempiNT.exe 0053552B Unknown Unknown Unknown CFX4  Solver  psolvempiNT.exe 00492B77 Unknown Unknown Unknown CFX4  Solver  psolvempiNT.exe 0042D97E Unknown Unknown Unknown CFX4  Solver  psolvempiNT.exe 00419CE5 Unknown Unknown Unknown CFX4  Solver  psolvempiNT.exe 0040B73B Unknown Unknown Unknown CFX4  Solver  psolvempiNT.exe 0040541C Unknown Unknown Unknown CFX4  Solver  CFX4  Solver  Stack trace terminated abnormally. CFX4  Solver  runsolve4: Job completed CFX4  Solver  Output file : /CFX_Work/m93.fo CFX4  Solver  CFX4  Solver  Finished. CFX4  Solver  What causes this and how do we avoid it? Thanks Ji 
Re: Mashing Problem?
maybe you should change the time steps

Re: Mashing Problem?
Hi Ji
The "zero stack length generated" error, is due to 3 sided surfaces which is poorly parameterised and has an edge length of zero. Go to Geometry > Show > Surface, then highlight all surfaces and apply. Look down the list of surfaces and you will see the problem surfaces have 4 sides but 1 side is zero, therefore 3 sided. There are 2 methods of solving this, join the problem surface with an adjoining surface to create a large trimmed surface, or recreate the surface as a trimmed surface. You could also check to see if any of the edges of the problem surfaces are not smaller than the tolerance. Steve 
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