Dear professors:
       I am a postgraduate student from Super Computing Center of Chinese Academy of Sciences. I have recently read your group's researches on Paramesh,and I am interested in trying your approach in applying for MHD in yeast.
A piece of codes relevant to "idest" in mpi_amr_prolong.F90 in derectory of mpi_source confused me.
the codes goes as following,

! Prolong data from working block to the new child block
        idest = 2


! cell-centered data
       if(lcc) then

         if(iopt.eq.1) then
           call amr_1blk_cc_prol_gen_unk_fun( &
     &              unk1(:,:,:,:,1), &
     &              ia,ib,ja,jb,ka,kb,idest,ioff,joff,koff,mype, &
     &              lb,parent_pe,parent_blk)
         elseif( then



if we use Single Injection in subroutine amr_1blk_cc_prol_gen_unk_fun.F90, we will switch to amr_1blk_cc_prol_inject(recv,ia,ib,ja,jb,ka,kb,idest,ioff,joff,koff,mype,ivar).
in that subroutine,idest is inherited from amr_prolong.F90,that is idest is given 2.
and recv is inherited from unk1(:,:,:,:,1).
according to comment lines which appeard in many *.F90,for example,amr_1blk_cc_cp_remote.F90
        idest        selects the storage space in data_1blk.fh which is to  be used in this call. If the leaf node is having its  guardcells filled then set this to 1, if its parent  is being filled set it to 2.
then I assume that unk1(:,:,:,:,1) store leaf nodes information,unk1(:,:,:,:,2) store parents'.
However, in subrountine amr_1blk_cc_prol_inject.F90
array recv originally which extracted from the solution array unk1(:,:,:,:,1)
performs a prolongation operation on unk1(...,idest).

How could children prolong to parents?
I am not clear about this question.
Any help from anyone will be greatly appreciated.
                                                                                      Tingxing Dong