Download [new] Microsoft.ace.oledb.12.0 Provider For Both — 64-bit

Get-OleDbProvider | Where-Object $_.Name -like "*ACE*"

The provider is part of the Access 2010 Database Engine . Later versions like 15.0 (Access 2013) or 16.0 (Access 2016) use different provider strings but are often backward compatible.

(on a 64-bit Windows OS), navigate to:

If you cannot resolve the installation or need newer features:

For example, a 64-bit version of Windows can run a 32-bit Microsoft Excel. That 32-bit Excel requires the 32-bit ACE.OLEDB.12.0 provider. download microsoft.ace.oledb.12.0 provider for both 64-bit

If you have ever tried to read an Excel file ( .xlsx ) or a CSV file directly from a SQL Server, an SSIS package, or a PowerShell script, you have likely encountered the infamous error:

string connectionString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Path\To\Your\Database.accdb;";

The architecture (bitness) of the calling application dictates which provider version Windows loads: Force installation of 64-bit ACE OLE DB provider

| Error Message | Likely Cause | Solution | |---------------|--------------|----------| | "Provider not registered" | Bitness mismatch or not installed | Install correct bit version. | | "Cannot update. A newer version is already installed" | Office 365 or newer ACE engine present | Uninstall newer engine first or use /passive . | | "Microsoft.ACE.OLEDB.12.0 is not recognized" | Missing redistributable | Download and install from official link. | | "External table is not in the expected format" | File corruption or Excel version mismatch | Save file as .xlsx or repair file. | | " cannot start your application. The workgroup information file is missing" | Access security issue | Ensure .mdw file path is correct in connection string. | Get-OleDbProvider | Where-Object $_

Download AccessDatabaseEngine.exe from Microsoft. Install your primary architecture normally. Then install the second architecture using AccessDatabaseEngine.exe /quiet from an admin command prompt.

Open (located at C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe ) and run the same script.

The (which includes the Microsoft.ACE.OLEDB.12.0 provider) is essential for connecting to Excel files, Access databases, and other text-based data sources outside of the traditional Microsoft Office ecosystem.

# Check 64-bit provider Get-OleDbProvider -Name "*ACE*" That 32-bit Excel requires the 32-bit ACE

If your app is , use the AccessDatabaseEngine_X64.exe . If your app is 32-bit , use the AccessDatabaseEngine.exe .

There is that installs both 32-bit and 64-bit drivers simultaneously on the same machine. "Both" refers to having the ability to download the correct installer for your specific architecture. To truly support both, you can run two installers using a passive approach (explained in Chapter 6).

To use the Microsoft.ACE.OLEDB.12.0 provider in your .NET application, follow these steps:

For 32-bit:

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Once installed, you can call the driver in your code regardless of whether your project compiles as x86 or x64 .