Library /sys$common/syshlp/macro$dwci.hlb help, overview, unsupported_compilation_options  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  The following list contains command-line compilation
  options not supported by DWCI:

   o  "Plus" lists and nonalphabetical "comma" lists of
      file names are not supported by DWCI.  (When you
      specify multiple file names using a command-line
      interface and you separate them by plus signs (+),
      the files are concatenated and compiled as one
      program.  When you separate the file names by
      commas (,), the programs are compiled separately.)

      You must use the DCL interface if you want to
      either compile multiple files as a single program
      or compile them separately in a sequence other than
      that shown in the FileView window.

      You can select more than one file from the FileView
      window (as with a "comma" list), but you cannot
      change the order in which they are compiled; they
      are compiled in the order shown.

   o  If you have a library of <*LANGUAGE*> source
      modules that you want to include in a compilation,
      you must use the DCL interface; the /LIBRARY
      qualifier has no equivalent in DWCI.