c 
c     Variables related to time integration
c
      real time,timef,fintim,timeio,timeioe
     $    ,dt,dtlag(10),dtinit,dtinvm,courno,ctarg
     $    ,ab(10),bd(10),abmsh(10)
     $    ,avdiff(ldimt1),avtran(ldimt1),volfld(0:ldimt1)
     $    ,tolrel,tolabs,tolhdf,tolpdf,tolev,tolnl,prelax
     $    ,tolps,tolhs,tolhr,tolhv,tolht(ldimt1),tolhe
     $    ,vnrmh1,vnrmsm,vnrml2,vnrml8,vmean
     $    ,tnrmh1(ldimt),tnrmsm(ldimt),tnrml2(ldimt)
     $    ,tnrml8(ldimt),tmean(ldimt)
      common /tstep1/ time,timef,fintim,timeio,timeioe
     $               ,dt,dtlag,dtinit,dtinvm,courno,ctarg
     $               ,ab,bd,abmsh
     $               ,avdiff,avtran,volfld
     $               ,tolrel,tolabs,tolhdf,tolpdf,tolev,tolnl,prelax
     $               ,tolps,tolhs,tolhr,tolhv,tolht,tolhe
     $               ,vnrmh1,vnrmsm,vnrml2,vnrml8,vmean
     $               ,tnrmh1,tnrmsm,tnrml2
     $               ,tnrml8,tmean

      integer ifield,imesh,istep,nsteps,iostep,lastep,iocomm
     $       ,instep
     $       ,nab,nabmsh,nbd,nbdinp,ntaubd 
     $       ,nmxt(ldimt),nmxh,nmxv,nmxp,nmxe,nmxnl,ninter
     $       ,nelfld(0:ldimt1)
     $       ,nconv,nconv_max
     $       ,ioinfodmp
      common /istep2/ ifield,imesh,istep,nsteps,iostep,lastep,iocomm
     $               ,instep
     $               ,nab,nabmsh,nbd,nbdinp,ntaubd 
     $               ,nmxt,nmxh,nmxv,nmxp,nmxe,nmxnl,ninter
     $               ,nelfld
     $               ,nconv,nconv_max
     $               ,ioinfodmp

      real pi
      common /tstep3/ pi
      
      logical ifprnt,if_full_pres,ifoutfld
      common /tstep4/ ifprnt,if_full_pres,ifoutfld
      

      real lyap(3,lpert)
      common /tstep5/ lyap  !  lyapunov simulation history
