anchor.diff:  !@!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
   
   program spherical_box
  -    !! Spherical box with real topography and idealised stage
  +    !! Test flow algorithms in a large area spherical box with complex topography
   
  -    use global_mod, only: ip, dp, default_nonlinear_timestepping_method
  +    use global_mod, only: ip, dp, charlen
       use multidomain_mod, only: multidomain_type
       use timer_mod, only: timer_type
       use logging_mod, only: log_output_unit
  
positive.code:     ! Local timing object
      type(timer_type) :: program_timer
  
      character(len=32) :: timestepping_method
  
      ! Approx timestep between outputs
      real(dp) :: approximate_writeout_frequency = 1000
  
negative.code:     call generic_stop
  #endif
  
      ! Single domain model
      allocate(md%domains(1))
  
      ! Setup basic metadata
      md%domains(1)%lw = global_lw
      md%domains(1)%lower_left =global_ll
      md%domains(1)%nx = global_nx
  