Hi,
This is a time step problem.
Just reduce the time step and proceed.
This may helps.

Regards
Satyaban

On Sun, 04 Nov 2007 rajesh j wrote :
>Hello RegCM3 users,
>Can anyone explain me what is meant by 'NaN', for
>example my run below
>
>
>
>*** solar declination angle =  9.75 degrees.
>  dectim =    80640.0000000000
>  OUT-history written date =    1998041418.00000
>  BCs are ready from  1998041418  to  1998041500
>      at day =  13.8003, ktau =      7950 :  1st, 2nd
>time deriv of ps =  NaN        NaN        ,  no. of
>points w/convection =      0
>      at day =  13.8872, ktau =      8000 :  1st, 2nd
>time deriv of ps =  NaN        NaN        ,  no. of
>points w/convection =      0
>      at day =  13.9740, ktau =      8050 :  1st, 2nd
>time deriv of ps =  NaN        NaN        ,  no. of
>points w/convection =      0
>
>
>
>Why this happen? Is it my fault? Kindly spare a
>response.
>Thanks,
>
>###########################################################################
>######                    Mr. Rajesh J.                            #######
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>######        Department of Atmospheric Sciences,                  #######
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>
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