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BC June 24, 2005 11:33

Hi,All I am using FLUENT Fuel Cell Toolbox to model a single PEM fuel cell stack.When I tried to initialize the model, I got the following error messages. Error: prf-set-var: invalid flonum Error Object: nan

Anyone knows how to solve the problem? Does that mean that I didn't specify all the required material properties correctly? I am desperate. Please help!


karmagos January 30, 2010 03:52

what version did you use?

shrinivaslokare July 12, 2011 19:25

Same issue
I have the same problem when I modified a case in fluent 13.0 and tried to read it in Fluent 12.1.4. I checked the case file is good by opening it in Fluent 13 multiple times. But with Fluent 12.1.4, it gives the same error message:
"Error: %prf-set-var: invalid flonum"

Any clue whats going on?



Roberto Meloni July 7, 2013 11:59

Hi guys,
Did anyone fix this fluent bug?
I'm running a simulation on Ansys 13 of an internal combustion engine and when I try to load the .cas and .dat files saved every 15 time step, this error message appears.

Thanks in advance.
All the best.

AlexHo May 17, 2014 18:27

Probably because of the different version of Fluent.

sanjeevkumar patne November 22, 2016 02:23

I too have the same problem.

I just considered the cylinder and given inlet velocity at one side and outlet pressure at the other side.
1. defined the surfaces as the temperature body
2. inlet air velocity 8 m/s.
3. trying to find the cooling response of the system.

In cell zone BC
when I define cylinder as fluid then there was no error, but I defined it as solid the error was showing as below

Error - %prf-set-var: invalid flonum
Error object - 1. inf

Kindly anyone suggest what is the problem.

Thanks in advance.

sanjeevkumar patne November 22, 2016 02:24

I am working in ANSYS Fluent 15 version

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