anchor.diff:      ! Mod from SixTrack
       ! ---------------------------------------------------------------------------------------------- !
       use numerical_constants, only : half
  +    use mathlib_bouncer,     only : log10_mb
   
       implicit none
   
       ! interface variables
       ! ---------------------------------------------------------------------------------------------- !
  -    class(ffTable_n_Track), intent(in)    :: this
  +    class(ffTable_n_Track), intent(inout) :: this
       real(kind=fPrec),       intent(in)    :: deltap1
       real(kind=fPrec),       intent(inout) :: zb
       real(kind=fPrec),       intent(inout) :: x,px,y,py ! Transverse canonical parameter in new referencial
  
positive.code:     constructT%n=0
      constructT%m=0
      constructT%s=0
  
      constructT%dz  =zero
      constructT%norm=zero
  
negative.code:     ! Mod from SixTrack
      ! ---------------------------------------------------------------------------------------------- !
      use numerical_constants, only : zero, one
      
      implicit none
      
  