constraint_eqn_043 Subroutine

   subroutine constraint_eqn_043(tmp_cc, tmp_con, tmp_err, tmp_symbol, tmp_units)
      !! Equation for average centrepost temperature: This is a consistency equation (TART)
      !! author: P B Lloyd, CCFE, Culham Science Centre
      !! args : output structure : residual error; constraint value;
      !! residual error in physical units; output string; units string
      !! Equation for average centrepost temperature: This is a consistency equation (TART)
      !! #=# tfcoil
      !! #=#=# consistency
      !! and hence also optional here.
      !! Logic change during pre-factoring: err, symbol, units will be assigned only if present.
      !! tcpav : input real : average temp of TF coil inboard leg conductor (C)e
      !! tcpav2 : input real : centrepost average temperature (C) (for consistency)
      !! itart : input integer : switch for spherical tokamak (ST) models:<UL>
      !! <LI> = 0 use conventional aspect ratio models;
      !! <LI> = 1 use spherical tokamak models</UL>
      use tfcoil_variables, only: tcpav, tcpav2
      use physics_variables, only: itart
      use tfcoil_variables, only:  i_tf_sup

      implicit none
            real(dp), intent(out) :: tmp_cc
      real(dp), intent(out) :: tmp_con
      real(dp), intent(out) :: tmp_err
      character(len=1), intent(out) :: tmp_symbol
      character(len=10), intent(out) :: tmp_units

      ! if the machine isn't a ST then report error
      if (itart == 0) call report_error(7)

      ! For some reasons these lines are needed to make VMCON CONVERGE ....
      if ( i_tf_sup == 0 ) then ! Copper case
         tcpav = tcpav - 273.15D0
         tcpav2 = tcpav2 - 273.15D0
      end if

      tmp_cc =   1.0D0 - tcpav/tcpav2
      tmp_con = tcpav2 * (1.0D0 - tmp_cc)
      tmp_err = tcpav2 * tmp_cc
      tmp_symbol = '='
      tmp_units = 'deg C'

      ! For some reasons these lines are needed to make VMCON CONVERGE ....
      if ( i_tf_sup == 0 ) then ! Copper case
         tcpav = tcpav + 273.15D0
         tcpav2 = tcpav2 + 273.15D0
      end if



   end subroutine constraint_eqn_043