arg_browseDir_inFileLst=""
allArgsUpCase=`echo "$*" | tr '[:lower:]' '[:upper:]'`
opt_browseDir_flag=`echo $allArgsUpCase | awk '/BRWS/ {print 1}; ! /BRWS/ {print 0}'`

narg=$#
while (($iarg < $narg))

  (( iarg = $iarg + 1 ))
  arg=$argv[$iarg]
  opt_usrInputFlag=`echo $arg | awk '/=/ {print 1}; ! /=/ {print 0}'`
  opt=`echo $arg | awk 'BEGIN {FS="="} {print $1}' | tr '[:lower:]' '[:upper:]'`
  par=`echo $arg | awk 'BEGIN {FS="="} {print $2}'`

  case $opt in

  # -- Mandatory Arguments -------------------------------------------------------------------------

  "--NXZ":                        # Mandatory)
  "--NX-NZ")
    arg_nxz=$par
    opt_nxz=1
    ;;

  "--VARP")
    arg_varp=$par
    opt_varp=1
    ;;

  # -- Optional Arguments --------------------------------------------------------------------------

  "--DRWPTH")
  "--TDARWIN-PATH")
    arg_drwPath=$par
    opt_drwPath=1
    ;;

  "--BASEIF")
  "--BASE-INFILE")
    arg_baseInFile=$par
    opt_baseInFile=1
    ;;

  "-DATAIF")
  "--DATA-INFILE")
    arg_tdatInFile=$par
    opt_tdatInFile=1
    ;;

  "--CMODIF")
  "--CMOD-INFILE")
    arg_cmodInFile=$par
    opt_cmodInFile=1
    ;;

  "--CMODOF")
  "--CMOD-OUTFILE")
    arg_cmodOutFile=$par
    opt_cmodOutFile=1
    ;;

  "--RSTRIF")
  "--RSTR-INFILE")
    arg_rstrInFile=$par
    opt_rstrInFile=1
    ;;

  "--NPOP")
    arg_npop=$par
    opt_npop=1
    ;;

  "--SG")
  "--SIGMA")
    arg_sigma=$par
    opt_sigma=1
    ;;

  "-DRW-V")
  "-DRW-VERBOSE")
  "-DRW-VRB-LEVEL")
  "--TDARWIN-VERBOSITY-LEVEL")
    arg_drwVrb=$par
    opt_drwVrb=1
    ;;

 "--BRWSDIR-CHECK":                       # Separates numbers from characters.)
  "--BRWSDIR-CHECK-COLPOS")
    opt_browseDir_chkColPos=1
    ;;

  "--BRWSDIR-SORT")
  "--BRWSDIR-SORT-FIELDS")
    arg_browseDir_sortPtn=$par
    opt_browseDir_sortFlds=1
    ;;

  "--BRWSDIR-GROUP")
  "--BRWSDIR-GROUP-TABLE")
    arg_browseDir_groupPtn=$par
    opt_browseDir_groupTbl=1
    ;;

  "--BRWSDIR-ALL")
  "--BRWSDIR-ALL-FILES")
    opt_browseDir_allFiles=1
    ;;

  "--BRWSDIR-RAYTRAC":                      # Display files related to raytrac.)
  "--BRWSDIR-RAYTRAC-FILES")
    opt_browseDir_raytracFiles=1
    ;;

  *)
    arg_browseDir_inFileLst="$arg_browseDir_inFileLst $arg"
    opt_browseDir_inFileLst=1
    ;;

  esac

end   # while