Well this question has got many possible answers. The best way to understand this is if we take the short and easy route. The QBDBMgrN not operating problem may take place because of the issues with the internet. Another reason can be if any third party is blocking your system’s firewall. If the installation is not done in the right way, then the operating problem may happen. Also, if the database manager is out of date then it creates the most problems. Otherwise any sort of networking issues encountering the file gets this problem on board. Keep reading this write up to find a way to deal with it.