If your application is "Any CPU" but you only have the 32-bit driver installed, it will fail on 64-bit Windows. You must match the application's process bitness to the driver. If you have multiple versions installed, use the setting in your web.config app.config to force the app to use the correct GAC Installation: This version is often registered in the Global Assembly Cache (GAC)
: The 4 prefix denotes compatibility with the .NET 4.0 runtime , while 112.3.0 indicates it corresponds to the Oracle 11.2.0.3.0 client.
While maintaining legacy software often requires sourcing specific files like version 4.112.3.0, relying on unmanaged 11g drivers introduces security, deployment, and cloud-compatibility risks.
Oracle.DataAccess.dll is the unmanaged driver that allows .NET applications to connect to Oracle databases. Unlike the "Managed" driver ( Oracle.ManagedDataAccess.dll ), the unmanaged provider requires the Oracle Client software (like Instant Client or full ODAC) to be installed on the machine running the application. 4.112.3.0 Release: Oracle Client 11.2.0.3 / 11.2.0.4 Target Framework: .NET Framework 4.0 and above. oracle.dataaccess.dll version 4.112.3.0 download
She stared at the numbers. 121 vs 112. A nine-number difference that felt like a canyon.
Accept the Oracle License Agreement and log into your free Oracle account to begin the download. 3. Installation Methods
“System.Data.OracleClient requires Oracle client software version 8.1.7 or greater.” If your application is "Any CPU" but you
This versioning can be confusing. Let’s decode it:
: The managed wrapper found the DLL, but the unmanaged side ( OraOps11w.dll ) cannot be located.
When searching for "oracle.dataaccess.dll version 4.112.3.0 download," many unverified DLL archive websites will appear. Downloading individual DLLs from these sites is highly discouraged for several reasons: watch your PATH environment variables
Oracle.DataAccess.dll is open source. It is part of Oracle’s free-to-distribute ODAC components, but you must adhere to the Oracle Technology Network (OTN) License Agreement. You may:
Always match bitness, watch your PATH environment variables, and consider migrating to Oracle.ManagedDataAccess for future projects.