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"wrong token type - expected Scalar, found on line 0 the word 'nan' " error observed.

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Old   January 13, 2020, 01:31
Default "wrong token type - expected Scalar, found on line 0 the word 'nan' " error observed.
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Saurabh Das
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Hello,
In a pimpleDyMFoam rotor simulation, after running seamlessly for 2.3 seconds of simulation time, with Courant number within the limits, the following error is observed:

Code:
--> FOAM FATAL IO ERROR: 
wrong token type - expected Scalar, found on line 0 the word 'nan'

file: /media/mslab02/space/STL_Trials/Deviation_0_1/Angle_8/system/data.solverPerformance.U at line 0.

    From function Foam::Istream& Foam::operator>>(Foam::Istream&, Foam::doubleScalar&)
    in file lnInclude/Scalar.C at line 93.

FOAM exiting
I understand that the 'nan' error happens because of some major issue, such as boundary conditions etc. but the same problem, with a different rotor geometry worked perfectly.
Is it the geometry that is causing problems? How do I solve this problem? Any guidance would be heavily appreciated.

Thank you.
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