anchor.diff:          ierr=2
           errstrng="write_props"
           if(idout.gt.izero) close(kw)
  -        close(kp)
  +        if(idsk.gt.izero) close(kp)
           return
   c
   c...  error writing to output file
  
positive.code:         ierr=4
          errstrng="write_props"
          if(idout.gt.izero) close(kw)
          close(kp)
          return
  c
   1000 format(1x,///,
  
negative.code: c                       Rensselaer Polytechnic Institute
  c                        (C) 2005  All Rights Reserved
  c
  c  All worldwide rights reserved.  A license to use, copy, modify and
  c  distribute this software for non-commercial research purposes only
  c  is hereby granted, provided that this copyright notice and
  