LOGICAL N_edge, S_edge, E_edge, W_edge
S_edge = exch2_isSedge(myTile).EQ.1
S_edge = .TRUE.
S_edge = .FALSE.
IF ( .NOT.overlapOnly .OR. N_edge .OR. S_edge ) THEN
IF ( S_edge ) THEN
IF ( interiorOnly .AND. S_edge ) jMinUpd = 1
IF ( S_edge ) jMinUpd = 1