Dear all;
     When the RegCM is running in parallel way, the domain is divided according to the x grid number:
     1 2 3 4 +++ 5 6 7 8 +++ 9 10 11 12
     If I want to change a variable (for example heart) based on 3456, I could use if(i>3&i<6) in serial run.
But in parallel run, they are cut into 3 blocks, and their subscripts are all 1-4. So I want to ask help on how I can only modify 3 4 5 6 grid value in parallel way. (the 4 grid belong two different blocks)
    May be controling the CPU number is a feasible way, but I don't familiar with MPI so much.



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