Syntax:  EXTRACT PRIMARY MODULE [-OUTPUT file_name] module_spec_list

  Extracts the primary modules of source analysis data files from an
  SCA library.

  Primary modules are modules that contain implementa- tion files.  SCA
  writes the modules to a file with the default file name
  module-name.ANA.  The module name is the name of the file the
  compiler created.  This command performs the reverse function of the
  LOAD command.