anchor.diff:  clater     &   ielno,iside,ihistry,pres,pdir,                                 ! tractn
   clater     &   prop,mhist,infmat,infmatmod,tminmax,                           ! materl
   clater     &   gauss,sh,shj,infetype,                                         ! eltype
  -clater     &   histry,rtimdat,ntimdat,nvisdat,                                ! timdat
  +clater     &   histry,rtimdat,ntimdat,nvisdat,iprestress,                     ! timdat
   clater     &   rgiter,gcurr,gi,gprev,gtol,rmin,rmult,nsiter,                  ! iterate
   clater     &   skew,                                                          ! skew
   clater     &   ncodat,nunits,nprint,                                          ! ioinfo
  
positive.code:      &   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
       &   skew,                                                          ! skew
       &   ncodat,nunits,nprint,                                          ! ioinfo
  
negative.code: clater     &   ielno,iside,ihistry,pres,pdir,                                 ! tractn
  clater     &   prop,mhist,infmat,infmatmod,tminmax,                           ! materl
  clater     &   gauss,sh,shj,infetype,                                         ! eltype
  clater     &   histry,rtimdat,ntimdat,nvisdat,iprestress,                     ! timdat
  clater     &   rgiter,gcurr,gi,gprev,gtol,rmin,rmult,nsiter,                  ! iterate
  clater     &   skew,                                                          ! skew
  clater     &   ncodat,nunits,nprint,                                          ! ioinfo
  