anchor.diff:        double precision s(*),stemp(*)
         double precision state(*),dstate(*),dmat(*)
         double precision pres(*),pdir(*)
  -      double precision prop(*)
  +      double precision prop(*),tminmax
         double precision gauss(*),sh(*),shj(*)
         double precision histry(*)
         double precision skew(*)
  
positive.code:      &     s,stemp,                                                     ! stiff
       &     state,dstate,dmat,ien,lm,lmx,lmf,infiel,iddmat,nstatesz,     ! elemnt
       &     ndmatsz,numelt,nconsz,                                       ! elemnt
       &     prop,mhist,infmat,infmatmod,numat,npropsz,                   ! materl
       &     gauss,sh,shj,infetype,                                       ! eltype
       &     histry,rtimdat,rgiter,ntimdat,nhist,lastep,stress_mat_cmp,   ! timdat
       &     skew,numrot,                                                 ! skew
  
negative.code:      & s,stemp,                                                         ! stiff
       & state,dstate,dmat,ien,lm,lmx,lmf,infiel,iddmat,npar,             ! elemnt
       & ielno,iside,ihistry,pres,pdir,                                   ! tractn
       & prop,mhist,infmat,infmatmod,tminmax,                             ! materl
       & gauss,sh,shj,infetype,                                           ! eltype
       & histry,rtimdat,ntimdat,nvisdat,                                  ! timdat
       & rgiter,gcurr,gi,gprev,gtol,rmin,rmult,nsiter,                    ! iterate
  