     { Collaboration } = remote.api
     Collaboration.stop @rtmFileId, @workspaceData, (err) =>
 
-      return warn err  if err
+      return throwError err  if err
 
       kd.utils.killRepeat @pingInterval
 

    if @amIHost
      @listChatParticipants (accounts) =>
        usernames = getUsernames accounts
        @setMachineUser usernames, status
    else
      @setMachineUser [nick()], status


  setMachineUser: (usernames, share = yes, callback = kd.noop) ->

        else args.join ' '

    argIndex = 0
    console.error """
      IDE.CollaborationController:
      #{ format.replace /%s/g, -> args[argIndex++] or '%s' }
    """
