CFD Online Discussion Forums

CFD Online Discussion Forums (
-   OpenFOAM Running, Solving & CFD (
-   -   Error Floating point exception (

celifani August 6, 2008 10:35

Hi! I'm working with OpenFOAM
I'm working with OpenFOAM for a simulation of the liquid steel behaviour for a Twin Roll Casting maschine.
I succesfully created a mesh and added the necessary boundary conditions.

When I start the computation with interFoam after the second time-iteration a get an error message: "Floating point exception".
I searched with google the meaning of this error but there's not lot of documentation.

Could you please tell me which could be one of the possible reason that yield such an error message?

Thank you,
Claudio Feliciani

hjasak August 6, 2008 11:36

Your solver blew up because of
Your solver blew up because of an illegal mathematical operation, like division by zero. I would think this is to do with either your initial/boundary conditions or material properties. For example, having zero density would do something like this.



celifani August 7, 2008 08:20

I've solved the problem by set
I've solved the problem by setting:

Now the simulation is running and the results seem to be good. Actually I know what the command unset FOAM_SIGFPE (it tell OpenFOAM to not send the term signal to the CPU in case of an illegal operation, if I've not understand wrong), but what could be the risks by using that method to remove the "Floating point exception" problem?

The same topic were discussed in but no answer were finally given.


N. A. December 21, 2010 15:04

Hi Claudio,

where do you "unste FOAM_SIGFPE". in etc/bashrc or some where else


boger December 22, 2010 09:42

Assuming you are using a bash shell, I would put it in your .bashrc

sheikh nasir February 8, 2012 02:02

Floating error
i am having floating error :invalid number problem. I am working train in tunnel. Can any body help me. My email is

sihaqqi April 17, 2013 04:43

I am doing LES of my geometry. In which dictionary do you put unset FOAM_SIGFPE. My dictionaries are what can be found in pitzDaily tutorial in pisoFOam. I shall be very grateful for your response.


All times are GMT -4. The time now is 10:48.