The native Oracle Client binaries (like oraclient11.dll ) found in your system path do not match version 11.2.0.3.
: If you just need to resolve compilation errors or missing assembly references in Visual Studio, community members have uploaded the wrapper to NuGet. You can look at the Oracle.DataAccess.x86.4 4.112.3 package. Warning: This package only helps compile your project. You still need the physical Oracle client installed on the runtime machine to actually query a database. 💡 Modern Alternative: Switch to Managed ODP.NET
Oracle’s technology is under the . You may use the client and ODP.NET only to connect to a licensed Oracle database. Distributing Oracle.DataAccess.dll standalone with your application may require a separate redistribution license. Always review the agreement for your specific version. oracle.dataaccess.dll version 4.112.3.0 download
You cannot download Oracle.DataAccess.dll as a standalone file. It must be installed using Oracle’s installers. Below are the official methods.
1. "An attempt was made to load a program with an incorrect format (0x8007000B)" The native Oracle Client binaries (like oraclient11
The installation should add the bin directory to your system's PATH environment variable. If not, add it manually: C:\oracle\product\11.2.0\client_1\bin Step 3: Register in Global Assembly Cache (GAC)
To help find the right setup for your environment, let me know: Warning: This package only helps compile your project
.NET Framework 4.x (indicated by the leading "4" in the version number) Available in both 32-bit (x86) 64-bit (x64) Oracle Forums 📥 Where to Download
Always match bitness, watch your PATH environment variables, and consider migrating to Oracle.ManagedDataAccess for future projects.
If you are starting a new project or can refactor, Oracle recommends switching to the Managed Driver Oracle.ManagedDataAccess.dll Oracle Forums
installation. To obtain this specific version, you must download the appropriate ODAC bundle: Stack Overflow Oracle ODAC 11.2 Release 4 (11.2.0.3.0) : This package includes the version of the DLL for .NET Framework 4.0. NuGet (32-bit only)