anchor.diff:  
               open(io, file=restart_file)
   
  +            write (io,*) 'Restart version'
  +            write (io,*) restart_version
               write (io,*) '# number of cycles'
               write (io,*) nmc_cycles
               write (io,*) '# shift'
  
positive.code:         integer, intent(in) :: nmc_cycles, nparticles_old
          character(255) :: restart_file
          integer :: io, i
  
          if (parent) then
              io = get_free_unit()
  
negative.code:             open(io, file=restart_file)
  
              read (io,*) junk
              read (io,*) restart_version
              read (io,*) junk
              read (io,*) mc_cycles_done
              read (io,*) junk
              read (io,*) nparticles_old_restart, shift, vary_shift
  