If you are receiving the following error message in the error logs of Ground2Cloud or when creating an instance:
{"errorMessage":"QB Connector is Running but Quickbooks File may not be open or Quickbooks is not running.","errorCode":501,"errorTrace":" at Quickbooks.Session_Framework.SessionManager.initialize(String appName, String appId, ENConnectionType connType)\r\n at Quickbooks.Session_Framework.SessionManager.getSessionInstance(String appName, String editionString)\r\n at CEConnector.Models.quickbooks.QuickbooksHelper.init(Object elementInstance)\r\n at CEConnector.Models.quickbooks.QuickbooksHelper.execute(Object input)"}
Make sure that the instance name that has been specified for QBE exists in the QBE integrated applications list.