%MAILSERV-W-FLK, file currently locked by another user

      One or more of the requested files is not currently accessible.
      Try again later.

  %MAILSERV-W-INSFPRM, missing command parameters

      You failed to supply the name of the files to send. You must
      supply a file specification. Resend the command with a file
      specification.

  %MAILSERV-W-IVKEYW, unrecognized keyword - check validity and spelling

      You specified an unknown encoding or reading mode. Resend
      the command using a legal encoding or reading mode with the
      /ENCODING or /MODE qualifier.

  %MAILSERV-W-NOFILES, no files found

      Supplied file specification does not match any available files.
      Use the DIRECTORY command to obtain a listing of the available
      files.

  %MAILSERV-F-NOFILESERV, file service is not enabled

      The mail server is not configured to operate as a file server.

  %MAILSERV-W-PRV, insufficient privilege or file protection violation

      You are not allowed access to one or more of the requested
      files.

  %MAILSERV-W-VALREQ, missing qualifier or keyword value

      You failed to supply a value with the /ENCODING or /MODE
      qualifier. Resend the command with a value specification.
    Return a list of the current subscribers to a particular mailing
    list.

    Syntax

      SEND/LIST  list-name

    Qualifiers            Defaults

    /COMMENTS             See text