FIXING: QBDBMgrn NOT RUNNING ON THIS COMPUTER ERROR WITH INSTANT SOLUTIONS Facing issues due to an error message that reads“QBDBMgrn not running on this computer?” We got you covered with our step-by-step procedures to deal with this problem. This issue commonly appears when on the client-server manager, the QuickBooks database stops responding. It is a very common issue and can be fixed with the help of QuickBooks Tool Hub if you require it.