N_edge = exch2_isNedge(myTile).EQ.1
& 'exch2_isNedge', 1, exch2_isNedge(tnum), myThid)
& .AND. exch2_isNedge(myTile).EQ.1
INTEGER exch2_isNedge(NTILES)
& exch2_isWedge, exch2_isNedge,
exch2_isNedge(2)=1
exch2_isNedge(3)=1
exch2_isNedge(4)=1
exch2_isNedge(1)=1
exch2_isNedge(5)=1
exch2_isNedge(6)=1