If you control the source code of the application, change the compilation target. Open your project in . Go to Project Properties > Build . Change the Platform Target from "Any CPU" or "x64" to x86 .
The Microsoft Office System Access Database Engine (ACE) provider replaced Jet. ACE supports both newer file formats (like .accdb and .xlsx ) and older formats (like .mdb and .xls ). Crucially, ACE is available in both 32-bit and 64-bit versions. To migrate to the modern provider:
He clicked the desktop icon to launch it. He held his breath. A grey modal box popped up with a red 'X'. Run-time error: download microsoft jet oledb 4.0
(the modern replacement).
, which is its modern replacement and supports both 32-bit and 64-bit systems. Stack Overflow For 64-bit applications: Microsoft.ACE.OLEDB.12.0 (or higher). For 32-bit applications: You can keep using Microsoft.Jet.OLEDB.4.0 , which is already in your system at C:\Windows\SysWOW64\msjetoledb40.dll Stack Overflow 2. Download and Install ACE OLEDB If you control the source code of the
In modern versions of Windows (Windows 2000 and later), the is actually built into the operating system . You generally do not need a separate download for the core engine itself.
Choose the version that matches your application's architecture: Select AccessDatabaseEngine.exe for the 32-bit version. Select AccessDatabaseEngine_X64.exe for the 64-bit version. Run the installer and follow the on-screen prompts. Change the Platform Target from "Any CPU" or "x64" to x86
Fixing the "Microsoft.Jet.OLEDB.4.0 provider is not registered" Error
Once you have installed the correct ACE provider (matching your application's bitness), you must change the "Provider" part of your connection string:
Are you trying to connect to an or an Excel spreadsheet ?