DAO 3.5 is a 32-bit only library. It will not work with 64-bit native applications. If your legacy app is 32-bit (most VB6 apps are), you can use DAO 3.5 on 64-bit Windows via the WOW64 subsystem. If your modern .NET app is compiled as "Any CPU" or "x64," you will get runtime errors.
If you encounter issues during installation or while using the DAO 2.5 and 3.5 compatibility library, ensure that: microsoft dao 2.5 3.5 compatibility library download
: C:\Program Files\Common Files\Microsoft Shared\DAO\ If your modern
Some online forums suggest installing the (AccessDatabaseEngine.exe). This installs ACE (Access 2007) , which includes DAO 3.6 but not specifically DAO 3.5. This works for many legacy apps, except those using Jet 3.5-specific features (like older replication or security models). This works for many legacy apps, except those using Jet 3
To understand why the "2.5/3.5 Compatibility Library" exists, we must first look at the evolution of Data Access Objects (DAO).