How to fix Microsoft.ACE.OLEDB.12.0 provider is not registered on the local machine

Hi,

Thank you for sharing your question. I understand how confusing this issue can be, especially when the connection fails even though everything appears properly installed on your system.

This error typically appears when the Microsoft Access Database Engine (ACE) is not installed, is installed in the wrong bit‑version, or the application you’re using does not match the bit‑ness of the provider. Microsoft guidance explains that the ACE provider is not included by default in Windows and must be manually installed. The correct fix is to install the appropriate Microsoft Access Database Engine Runtime 32‑bit or 64‑bit depending on what Labelview requires and what your system runs. Official responses confirm that installing the matching version of the database engine resolves the “Microsoft.ACE.OLEDB.12.0 provider is not registered” error. Additionally, if your app is running in a different bit‑mode (for example, Labelview is 32‑bit but the 64‑bit provider is installed), Windows cannot load the DLL, and you’ll see this error. Ensuring bit‑version alignment and installing the correct ACE runtime version typically resolves the issue. If the error continues, older versions of the Access Database Engine (such as AccessDatabaseEngine.exe 14.0.x) have also been reported to resolve the problem temporarily until the correct configuration is identified.

Would you like help checking whether Labelview is running in 32‑bit or 64‑bit mode so we can determine exactly which version of the Access Database Engine you need?

Please feel free to share your Labelview version or any additional error details so I can guide you toward the correct runtime and ensure your database connection works properly.

Best Regards,

Noel