The assembly Oracle.DataAccess.dll version 4.112.3.0 is the primary driver for Oracle Data Provider for .NET (ODP.NET), specifically bundled with ODAC 11.2 Release 4 (11.2.0.3.0). This legacy version is critical for .NET Framework 4.0 (and above) applications that still rely on "Unmanaged" Oracle clients to connect to older databases or use features like User-Defined Types (UDTs). Direct Download and Installation
Oracle does not provide a standalone download for just the .dll. You must download the full Oracle Data Access Components (ODAC) package.
Official Source: Visit the Oracle .NET ODAC Downloads page. Since version 11.2.0.3.0 is older, check the ODAC 11.2 Release 4 (11.2.0.3.0) Install Instructions for archived links.
XCopy Version: For lighter deployments, use the ODAC 11.2.0.3.0 XCopy zip.
NuGet (Non-Official): While there is a NuGet package for Oracle.DataAccess.x86.4, it is a community-maintained package and may still require a local Oracle client to function. Key Technical Specifications Full Version ODAC Release 11.2 Release 4 (11.2.0.3.0) Target .NET Framework .NET Framework 4.0, 4.5, and above Processor Architecture x86 (32-bit) or x64 (64-bit) versions available Primary Dependency Requires Oracle Client (Instant, Runtime, or Full) Installation & Troubleshooting Steps 1. Registration in the GAC
If your application cannot find the DLL (error FileNotFoundException), it likely needs to be registered in the Global Assembly Cache (GAC). Use the OraProvCfg.exe tool located in your Oracle Home:
# Navigate to your ODP.NET bin folder cd C:\app\oracle\product\11.2.0\client_1\odp.net\bin\4 # Register the DLL OraProvCfg.exe /action:gac /providerpath:Oracle.DataAccess.dll Use code with caution. 2. Fixing Architecture Mismatch ODAC 11.2.0.3.0 Install Instructions - Oracle
Introduction
Oracle Data Access Components (ODAC) is a library of .NET data providers that enable .NET developers to access Oracle databases. The oracle.dataaccess.dll is a key component of ODAC, which provides a set of classes that allow .NET applications to connect to Oracle databases, execute SQL statements, and retrieve data.
Oracle Data Access Components (ODAC) Version 4.112.3.0
The ODAC version 4.112.3.0 is a specific release of the ODAC library, which supports Oracle Database 12c and later versions. This version of ODAC includes several enhancements and bug fixes, including support for .NET Framework 4.5 and 4.6.
Downloading oracle.dataaccess.dll version 4.112.3.0
To download the oracle.dataaccess.dll version 4.112.3.0, follow these steps:
odac4.112.3.0.exe) and run it on your machine.C:\Oracle\ODAC4.112.3.0) and locate the oracle.dataaccess.dll file.Installation and Configuration
After downloading and extracting the oracle.dataaccess.dll file, you need to install and configure ODAC on your machine:
oracle.dataaccess.dll file in the Global Assembly Cache (GAC) using the gacutil.exe tool or by using the ODAC installer.tnsnames.ora file is properly configured on your machine to connect to the Oracle database.oracle.dataaccess.dll file.Conclusion
In this paper, we provided an overview of Oracle Data Access Components (ODAC) and guidance on obtaining the oracle.dataaccess.dll version 4.112.3.0. By following the steps outlined above, you should be able to download, install, and configure ODAC on your machine, enabling your .NET applications to access Oracle databases. If you encounter any issues, you can refer to the Oracle documentation and support resources for further assistance.
If you have a valid Oracle Support contract, you can locate specific patch numbers (e.g., Patch 14727310) that update ODP.NET to 4.112.3.0. This is the most precise way to get the exact build matching your environment.
Oracle never published version 4.112.3.0 to NuGet.org. Some private NuGet servers (e.g., internal company feeds) may have it, but you cannot obtain it from the official NuGet gallery.
Summary
Where the version appears
Compatibility & risks
How to obtain safely (recommended)
Troubleshooting checklist (if you have the DLL but see errors)
Relevant references (for verification)
If you want, I can:
The Patch at Midnight
Anya’s screen glowed in the dark of her cubicle. The deadline was 8:00 AM. The error log was screaming.
“System.Data.OracleClient requires Oracle client software version 8.1.7 or greater.”
She had migrated the legacy payroll system to a new server three hours ago. The old one, a wheezing dinosaur named NOSTROMO-1, had finally given up the ghost. The new machine— sleek, powerful, unnamed— was refusing to talk to the Oracle database.
The problem, as always, was the Data Access Layer.
She needed Oracle.DataAccess.dll, the managed provider. But not just any version. The old code, written by a wizard who had since retired to a cabin with no Wi-Fi, had hardcoded a dependency on a specific build: version 4.112.3.0.
"It's like a key cut for a specific lock," her mentor had told her years ago. "4.112.3.0 has a particular way of handling connection pooling and Unicode. 4.121.1.0? Close, but it will choke on the date format. 4.112.2.0? Missing a security patch for the cipher suite. It has to be exact."
The official Oracle website was a labyrinth of login portals, license agreements, and dropdown menus that led to "Oracle Data Access Components (ODAC) 12c Release 4." She downloaded it. She installed it. She navigated to C:\app\client\product\12.1.0\client_1\odp.net\bin\4. There it was. Version 4.121.2.0.
She stared at the numbers. 121 vs 112. A nine-number difference that felt like a canyon.
At 1:17 AM, desperation set in. She started Googling the exact phrase: "oracle.dataaccess.dll version 4.112.3.0 download"
The results were a graveyard. Dead links to Oracle’s old edelivery site. A sketchy forum post in Russian from 2014. A single, lonely Stack Overflow question with zero answers.
Then, a flicker. A cached page from a defunct IT solutions company in Wisconsin. The link was broken, but the cached text held a note:
“For legacy support of version 4.112.3.0, the required DLL is found only in ODAC 11.2 Release 6 (11.2.0.3.20). Do not use Release 7.”
Her heart hammered. ODAC 11.2. Release 6. That was ancient—pre-Windows 10, pre- containerization, pre-common sense. oracle.dataaccess.dll version 4.112.3.0 download
She found it on Oracle’s "Archive" section, buried under three layers of "Legacy Products." The download was 800 megabytes. It took forty minutes on the office’s throttled guest Wi-Fi.
At 2:14 AM, she extracted the ZIP. She navigated to the odp.net folder. There, like a tiny metallic artifact in a dusty tomb, was the file.
Oracle.DataAccess.dll
Version 4.112.3.0
Size: 4.21 MB
She didn't copy it to the GAC. She didn't run an installer. She simply dropped the lone DLL into the bin folder of her new server’s application directory.
She opened a command prompt. Ran the test harness.
Connecting to PAYROLL_PROD... Success.
Running test query... 2,147 rows returned.
Disconnecting... Done.
Silence. No errors. No warnings.
At 2:21 AM, Anya leaned back. The payroll system would process at dawn. The DLL, a ghost from a bygone Oracle era, had bridged the gap.
She closed her laptop and walked to the window. Outside, the city slept, never knowing that its paychecks owed their existence to version 4.112.3.0— a piece of forgotten software, now safe in its new home, faithfully translating ones and zeroes until the end of time.
Oracle.DataAccess.dll is not 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: