anchor.diff:  c~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   c
   c
  -      subroutine write_element_info(numel,intord,ipstrs,ipauto,tpois,
  +      subroutine write_element_info(numelv,intord,ipstrs,ipauto,tpois,
        & tyoungs,kw,idout,ofile)
   c
   c...subroutine to write element and prestress parameters
  
positive.code: c
  c...  subroutine arguments
  c
        integer numel,intord,ipstrs,ipauto,kw,idout
        double precision tpois,tyoungs
        character ofile*(*)
  c
  
negative.code: 700   format(1x,///,
       &' e l e m e n t    s y s t e m   d a t a',///,5x,
       &' element type:  ',a40,//,5x,
       &' number of volume elements. . . . . . . . . (numelv) =',i7,//,5x,
       &' integration order . . . . . . . . . . . = ',a17,//,5x,
       &' prestress option. . . . . . . . . . . . . .(ipstrs) =',i5,/ ,5x,
       &'    eq.0, prestresses are read from the input file    ', / ,5x,
  