           statusText: 'The collection ' + req.body.images[0].value + ' does not exist on the server'
         callback err, null
         return
-
       folder = nconf.get('paths:imageRootPath') + path.sep + collection.name
       collection.inputParameters = _.clone(req.body.inputs)
       setCollectionHighlighter(collection, req)

        requestCallback null, collection.result

  preprocessCollection = (collection, req, serviceInfo, parameterHelper,executionType, callback) ->
    #process a collection

    #check if collection exists
    if(collection.hasImages)
      if(not ImageHelper.checkCollectionAvailable(req.body.images[0].value))
        err =
          statusCode: 500

          process.hasImages = true
          collection.processes.push(process)
        callback null, collection

    process = new Process()
    if (collection.hasFiles)
      process.hasFiles = true
