Why is QuickBooks showing “qbdbmgrn not running on this computer”?

[sandy_88]

QuickBooks Desktop returns ‘qbdbmgrn not running on this computer’ on the host machine. Multi-user access fails, and company file is inaccessible. Restarting the service and server didn’t help. Looking for proven fixes—service startup, firewall, or permissions steps to restore multi-user access quickly. Any scripts or logs to check?

[hinemev437 · Accepted solution]

If you’re seeing the error “qbdbmgrn not running on this computer” in QuickBooks Desktop, it means the QuickBooks Database Server Manager (QBDBMgrN) service isn’t active on your host system. This prevents multi-user access, making your company file inaccessible over the network.

Start by opening Windows Services (services.msc) and locating QuickBooksDBXX (where XX is your version). Make sure it’s set to Automatic and click Start if stopped. If the service fails to start, your Windows Firewall or third-party antivirus may be blocking ports (8019, 56728, 55378-55382). Reopen QuickBooks Database Server Manager via Tool Hub > Network Issues to rescan your folders.