What causes QuickBooks error 12029?

You may be busy working on QuickBooks error 12029. If you're getting QuickBooks Error 12029 often, it's probably because of a server problem. Specifically, it indicates that the QB program is unable to correlate IP addresses to servers. It's also possible that QuickBooks is experiencing connectivity issues with the backend server. This might occur as a result of internet security and firewall setting on the PC. Hence, the settings should be set to allow the access of QuickBooks to the internet.