anchor.diff:             fluka_con = fluka_connect()
              if(fluka_con.eq.-1) then
   !                no hope to properly close the run
  -             write(lout,'(A)') 'FLUKA> unable to connect to fluka while closing the simulation:'
  -             write(lout,'(A)') 'FLUKA>  please, manually kill all its instances'
  +             write(lerr,'(A)') 'FLUKA> ERROR Unable to connect to fluka while closing the simulation:'
  +             write(lerr,'(A)') 'FLUKA>       please, manually kill all its instances'
                write(fluka_log_unit,'(A)') '# unable to connect to fluka while closing the simulation:'
                write(fluka_log_unit,'(A)') '#   please, manually kill all its instances'
                goto 1982
  
positive.code:            napx, xv1, xv2, yv1, yv2, sigmv, ejv, naa, nzz, nucm )
  
        if (ret.eq.-1) then
           write(lout,'(A)')'FLUKA> Error in Fluka communication in kernel_fluka_entrance...'
           write(fluka_log_unit,'(A)')'# Error in Fluka communication in kernel_fluka_entrance...'
           call prror
        end if
  
  
negative.code:     call f_open(net_nfo_unit, file=net_nfo_file, formatted=.true., mode="rw", status='old')
      read(unit=net_nfo_unit, fmt=*, iostat=ios) host
      if(ios .ne. 0) then
        write(lerr,'(A)') 'FLUKA> ERROR Could not read the host name from network.nfo'
        call prror
      end if
  
      read(unit=net_nfo_unit, fmt=*, iostat=ios) port
      if(ios .ne. 0) then
        write(lerr,'(A)') 'FLUKA> ERROR Could not read the port number from network.nfo'
        write(lerr,'(A)') 'FLUKA>       Is the FLUKA server running and has it had time to write the port number?'
        call prror
      end if
  
  