anchor.diff:  c~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   c
   c
  -      subroutine write_subiter(rmult,rmin,nsol,maxcg,kw,idout,ofile)
  +      subroutine write_subiter(nprevdflag,kw,idout,ofile)
   c
   c...subroutine to write parameters controlling the subiteration
   c   process
  
positive.code: c
  700   format(///' l i n e a r   s o l u t i o n   ',
       & 'i n f o r m a t i o n'//,5x,
       & ' PCG solution method  . . . . . . . . . . . (nsol)  =',i5,//,5x,
       & '    eq.1,  diagonal preconditioner,                  ',/,5x,
       & '           use zero initial guess                    ',/,5x,
       & '    eq.2,  diagonal preconditioner,                  ',/,5x,
       & '           use displacements from previous step      ',/,5x,
       & '    eq.3,  symmetrized Gauss-Seidel preconditioner   ',/,5x,
       & '           use zero initial guess                    ',/,5x,
       & '    eq.4,  symmetrized Gauss-Seidel preconditioner   ',/,5x,
       & '           use displacements from previous step      ',//,5x,
       & ' maximum number of PCG iterations . . . . . (maxcg) =',i5,//,5x,
       & ' accuracy multiplier for displacement . . . (rmult1)=',1pe15.8,
       & /,5x,
       & ' accuracy multiplier for force. . . . . . . (rmult2)=',1pe15.8,
       & /,5x,
       & ' accuracy multiplier for energy . . . . . . (rmult3)=',1pe15.8,
       & /,5x,
       & ' minimum displacement accuracy. . . . . . . (rmin1) =',1pe15.8,
       & /,5x,
       & ' minimum force accuracy . . . . . . . . . . (rmin2) =',1pe15.8,
       & /,5x,
       & ' minimum energy accuracy. . . . . . . . . . (rmin3) =',1pe15.8)
        end
  
negative.code: c
  c                             Charles A. Williams
  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
  