diagnostics of Advective Flux will not work if SOLVE_DIAGONAL_LOWMEMORY  is defined: add a STOP to catch this.
diagnostics of Advective Flux will not work if SOLVE_DIAGONAL_LOWMEMORY
 is defined: add a STOP to catch this.

altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h