The provider is not compatible with the version of Oracle client

Question

1.00/5 (1 vote)

See more:

, +

Hi All,

I am getting the following exception when I am trying to connect to Oracle using .Net code.

The type initializer for 'Oracle.DataAccess.Client.OracleConnection' threw an exception.

the inner exception gives the following message.

"The provider is not compatible with the version of Oracle client."

I have lot of solutions on net and little confused in understanding the real problem.

My project Environment.

1. Oracle 11g.
2. Oracle Client version
SQL*Plus: Release 11.2.0.2.0
3. Visual Studio 2010 - Calling Oracle from WCF service
4. Oracle Home - C:\Oracle\Product\11.2.0\client_2
5. ODP.NET version
C:\Oracle\Product\11.2.0\client_2\odp.net\bin\2.x - 2.112.2.0
C:\Oracle\Product\11.2.0\client_2\odp.net\bin\4 - 4.112.2.0

I am little curious to know whether this exception is coming because of some ODP.NET issue or some other .dll issue.

However, on the contrary if I am using the .asmx to connect to the Oracle it is working fine.

Please help me in understanding the real problem whether it is at the client side or the server side where the WCF service is deployed.

Thanks in advance.

"Happy Coding"

Posted 7-Jul-13 19:22pm

TapasU

Add a Solution

3 solutions

Solution 3

Thanks guys for your replies.
I got this problem solved. I was actually missing the correct version of Oracle.DataAccess.dll

I added Oracle.DataAccess.dll -4.112.3 in the Bin of my executable and got it resolved.

Posted 10-Jul-13 21:29pm

TapasU

Comments

Aaanand 24-Jan-18 16:32pm

I had same issue and tried to follow your route and installed ODP.Net to get Oracle.Dataaccess 4.112.3 in ref and started getting this error:
"Could not load file or assembly 'Oracle.DataAccess' or one of its dependencies. An attempt was made to load a program with an incorrect format."
I tried "Any CPU, "x86" and "x64" but none of any worked..
if I put my old dll 4.112.2, it again gives oracle driver issue but this assmebly error doesnt come..

Member 13794998 22-Nov-18 16:08pm

I Tried all possible ways still I have no luck. Can anyone help me with the below error
the provider is not compatible with the version of oracle client at oracle.dataaccess.client.oracleinit.initialize()

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Mehdi Gholam · Accepted Answer · 2013-07-07T19:56:00

Solution 1

1) Check if you are compiling to x86 or Any CPU (Any CPU is preferred since it will work on 64bit and 32bit and possibly your asmx is 64bit which is working).

2) Check your .net versions you are building with in your projects.

Posted 7-Jul-13 19:56pm

Mehdi Gholam

Comments

Kenji Kumakura 2-Aug-13 11:59am

In my case changing platform target to x86 solved the problem.

Prasad Khandekar · Accepted Answer · 2013-07-07T20:39:00

Solution 2

Hello,

The error kind of suggests that it's the problem with the dependencies. Please check whether you are using correct versions of depenencies with ODP.NET provider. You may find this blog post[^] useful in resolving this issue.

Regards,

Posted 7-Jul-13 20:39pm

Prasad Khandekar