What is QuickBooks Error Code 80029c4a? QuickBooks Error Code 80029c4a is an error that occurs when you try to open QuickBooks. This error can prevent you from accessing your company files, causing significant disruptions in your business operations. The error message usually reads, "Error loading type library/DLL." Reasons for QuickBooks Error Code 80029c4a QuickBooks Error Code 80029c4a can...