     # Subscribe to the 'err' response for topicId
     # We don't pass a callback immediately so that we can
     # refer to the subscription itself in the callback.
-    errSub = core.bus.subscribe {
+    errSub = bus.subscribe {
       channel: replyTo.channel
       topic: replyTo.topic.err
       callback: callback

    onTimeout = ->
      err = new Error "Request timed out on channel '#{channel}'"

      core.bus.publish
        channel: replyTo.channel
        topic: replyTo.topic.err
        data: err



core =
  modules: getAxiomModules()

  config:
