The library is not installed, or the reference path is broken.
If you cannot use DAO 3.6 due to environmental restrictions (e.g., 64-bit only hosting, modern compliance), consider these alternatives:
Run the installer as Administrator. Accept the license terms. The installation is silent and will place DAO 3.6 files (including dao360.dll ) in: microsoft dao 3.6 object library download
While DAO 3.6 is a legacy technology, its stability and performance with Jet/ACE databases ensure it remains in use in countless enterprise VBA applications, automation scripts, and classic VB6 systems. By following this guide, you can correctly install, reference, and troubleshoot the library without risking system security or stability.
Unlike typical software, you rarely download DAO 3.6 as a standalone installer directly from Microsoft’s public download center. Instead, DAO 3.6 is installed as part of other Microsoft products or redistributable packages. The library is not installed, or the reference
For Access 2007 and newer, use the Microsoft Office Access database engine Object Library (also known as ACE). This library is fully compatible with old DAO code while supporting 64-bit environments.
Last updated: 2025. Information based on Microsoft documentation and real-world support experience. The installation is silent and will place DAO 3
If you are a developer, include the redistributable as a prerequisite in your setup package. Never bundle the DLL from questionable sources.
A: No. DAO 3.6 requires DLL registration and cannot be run from a USB drive without installation.