anchor.diff:    integer, parameter :: dist_fmtP           = 23 ! Particle momentum
     integer, parameter :: dist_fmtDEE0        = 24 ! Relative particle energy (to reference particle)
     integer, parameter :: dist_fmtDPP0        = 25 ! Relative particle momentum (to reference particle)
  -  integer, parameter :: dist_fmtPT          = 26 ! Delta enery over reference momentum (Pt)
  +  integer, parameter :: dist_fmtPT          = 26 ! Delta energy over reference momentum (Pt)
   
     ! Normalised Coordinates
     integer, parameter :: dist_fmtXN          = 31 ! Normalised horizontal position
  
positive.code:   ! Physical Coordinates
    integer, parameter :: dist_fmtX           = 11 ! Horizontal position
    integer, parameter :: dist_fmtY           = 12 ! Vertical positiom
    integer, parameter :: dist_fmtXP          = 13 ! Horizontal momentum ratio
    integer, parameter :: dist_fmtYP          = 14 ! Vertical momentum ratio
    integer, parameter :: dist_fmtPX          = 15 ! Horizontal momentum
    integer, parameter :: dist_fmtPY          = 16 ! Vertical momentum
    integer, parameter :: dist_fmtPXP0        = 17 ! Relative horizontal momentum
    integer, parameter :: dist_fmtPYP0        = 18 ! Relative vertical momentum
    integer, parameter :: dist_fmtZETA        = 19 ! Longitudinal relative position (canonical)
    integer, parameter :: dist_fmtSIGMA       = 20 ! Longitudinal relative position
    integer, parameter :: dist_fmtDT          = 21 ! Time delay
  
negative.code:   case(dist_fmtE, dist_fmtDEE0, dist_fmtPT)
      call chr_cast(inVal, dist_partCol6(partNo), sErr)
      dist_partCol6(partNo) = dist_partCol6(partNo) * dist_colScale(colNo)
  
    case(dist_fmtP)
      call chr_cast(inVal, dist_partCol6(partNo), sErr)
      dist_partCol6(partNo) = dist_partCol6(partNo) * dist_colScale(colNo)
  
    case(dist_fmtDPP0, dist_fmtPZN, dist_fmtPhiZ)
      call chr_cast(inVal, dist_partCol6(partNo), sErr)
      dist_partCol6(partNo) = dist_partCol6(partNo) * dist_colScale(colNo)
  
    !  Ion Columns
    ! =============
  