integer iscode,indpdb,outpdb,outmol2,icomparfunc,pdbint,
     & ensembles,constr_dist,symetr
      logical refstr,pdbref,punch_dist,print_rms,caonly,verbose,
     & merge_helices,bxfile,cxfile,histfile,entfile,zscfile,
     & rmsrgymap,with_dihed_constr,check_conf,histout
      common /cntrl/ iscode,indpdb,refstr,pdbref,outpdb,outmol2,
     & punch_dist,print_rms,caonly,verbose,icomparfunc,pdbint,
     & merge_helices,bxfile,cxfile,histfile,entfile,zscfile,rmsrgymap,
     & ensembles,with_dihed_constr,constr_dist,check_conf,histout,
     &symetr