Hi :
   I run 6 months with newly RegCM.but after 3 months , Nan appears.
My domain.param is as following:
    clat = 35
    clon = 103
     ds  = 50
     dx  = 112
     dy  = 112   
    data= 'NNRP1'

regcm.in
     dt = 100

other is not unchanged!

     My FC is ifort 10
     Please give me some help!

                    thank you!

                                                                                 Xue
                                                                              20090731