For some reason, when publishing, Visual Studio always uploaded v4. That's why I was getting an error. Can you connect to this data source using another app, such as Excel or Access? We had the same problem, because the Oracle. Removing the reference from the project, and adding it again solved the problem. I decided to try reinstalling Oracle client again instead of this mess with file copying, config changes, etc. I faced a similar issue and the root cause was that GAC had 2 oracle.
My application was referring to v4. Before :. After :. This issue could by happen while using unmanaged oracle reference if you have more than one oracle client , or sometimes if you reference different version There is two way to solve it :. First and fast solution is to remove unmanaged reference and use the managed one from NuGet see this before to go with this option Differences between the ODP. Check the platform that matches with you project platform.
From gac folder search to Oracle. Right Click on Oracle. Recently I had to work on an older project where the solution and all contained projects were targeted to x32 platform. I kept on trying to copy Oracle. Finally the bulb in the head lit up after 8 hours : , and asked to check for the installed ODAC assemblies and their platform.
I had all the bit x64 ODAC clients installed already but not the 32 bit ones x Installed the bit ODAC and the problem disappeared. Apparently, in the foreign language of Oraclish, that means that your program are either targeting all platforms, or bit machines.
Simply change your target platform in Project Properties to bit and hope for the best. I had the same issue with Oracle. In my case after 2 days of trying I found that the problem was permissions on the bit-home version. Many Directories in that version had exclusively overridden permissions where "Authenticated Users" role did not have "Read" access, which is set by default on the parent directory.
Once the permissions were inherited from the parent directory to those child subdirectories everything started to work. I didn't what to override the permissions on the whole oracle home so I did them one directory at a time, but I guess if you don't worry about security so much you can reset it on the whole corresponding oracle home directory. Lots of theoretical answers here, but here comes a working example with code that you can copy and paste and test immediately:.
How are we doing? Please help us improve Stack Overflow. Take our short survey. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. The provider is not compatible with the version of Oracle client Ask Question.
Asked 12 years, 8 months ago. Active 1 year, 2 months ago. Viewed k times. I've referenced the Data Provider in Visual Studio and the code behind looks like this: using Oracle. Close ; The error for the page looks like this: Exception Details: Oracle. OracleConnection' threw an exception.
Leniel Maccaferri Add a comment. Active Oldest Votes. Matt Chris Chris Your solution worked for me -- found your blog post before I found this. You are the man.
A simple windows search turned them up very quickly. Sounds like the newer version makes it easier to find the dll's. Now how long till oracle rolls them into one simple dll You should probably use the C managed driver these days if you can : — Chris. This solution may fail if your customer has a normal Oracle Client installation because Oracle.
In such case Oracle. This can cause the "version is not compatible" error. Show 9 more comments. Community Bot 1 1 1 silver badge. Tod Thomson Tod Thomson 4, 2 2 gold badges 31 31 silver badges 33 33 bronze badges. Its good news that Oracle finally has a fully managed driver. Lugging around that mb dll has been a real burden. Just so everyone is aware, while the Managed provider is nice, it lacks a lot of features that the full provider allows for.
Namely, Oracle's built in encryption. Oracle's documentation tends to be "scattered" to say the least. Here's a good link on some unsupported methods. Additionally, the driver itself comes with a readme that outlines some limitations. Usage of managed driver is the final solution! Show 4 more comments. I just installed it and the error disappeared! Kiquenet Chris: Yes, you can.
In my experience, though, you need oci. Other way around for me - I'd installed the client, but not the provider — Ev. Daniel Daniel 2 2 gold badges 11 11 silver badges 14 14 bronze badges. Just ran into this one. Worked in a bit test app, then fell over in IIS. Rather than require all the assemblies involved to be bit, I changed to a bit AppPool. Let's make some kind of summary: Error message "The provider is not compatible with the version of Oracle client" can be caused by several reasons.
You have no Oracle Client installed. In this case the error message is indeed misleading. Solutions Consider to use the ODP. Wernfried Domscheit Wernfried Domscheit This IMO has more knowledge to take away than the actual answer.
So if I have a x86 application for. Oracle says any client version is compatible with any db version. Is the answer with bit users install the bit version and bit users install bit version and use the ODP. When you use the ODP. NET Managed Driver then it is not required to install any Oracle client - that's the main advantage of it.
It works with both, x86 and x64 applications. Without "ODP. NET Managed Driver" a x86 application requires also an x86 i. I don't think this error is related or caused by Oracle or ODP. NET — Wernfried Domscheit. It works for me, I install Oracle. Show 2 more comments. The other files mentioned here did not appear to be necessary in my situation.
UPDATE The root cause of the "The provider is not compatible with the version of Oracle client" error is generally that the managed assembly is attempting to load unmanaged libraries which do not match versions.
Your solution give me the idea that work after 2 days I have Visual Studio Net 4, Oracle 10g client And It works. HainKurt HainKurt 51 1 1 silver badge 1 1 bronze badge. For Oracle 11g You want to say MB — Elmue. If you must use the old provider, you need to point Oracle.
If you have multiple Oracle Clients installed on your machine that maybe a simple as including the "DllPath" configuration variable see below in you app config, but you may also need to install a new oracle client to point to. It's made up of two pieces: the managed. From the Oracle Documentation : The Oracle.
Directory of the application or executable. DllPath setting specified by application config or web. DllPath setting specified by machine. DllPath setting specified by the Windows Registry. Peter Meyer Peter Meyer 25k 1 1 gold badge 32 32 silver badges 52 52 bronze badges. AjitDh AjitDh. Hydtechie Hydtechie 21 1 1 bronze badge. Now I'm happy again and I can open a new OracleConnection. Leniel Maccaferri Leniel Maccaferri Come over here, in the corner.
Listen man, I spent all day figuring out what the hell "provider not compatible" was supposed to mean, only to find out later that it's because some installation dependency was not met. Please--no--I demand that you make your installer check for these dependencies at installation time, and warn the user if it is not met. By the way, I've had to come back to this stackoverflow question on multiple occasions, and a different answer applies to me every time.
What a waste of time and money this has caused. So what I did was: Copied Internal. Copied Oracle. Add Reference to both of them from my web site. Finally Oracle. DataAccess reference showed up in myWebSite. I manually changed the reference in myWebSite. Robotronx Robotronx 1, 2 2 gold badges 19 19 silver badges 38 38 bronze badges.
It's a really bad idea to add a reference to dlls in a bin folder. The bin and obj folders are output folders; this is where dlls go when you build your project. You should be able to delete these folders at any time without creating conflict. Usually these folders are ignored in source control. The standard practice is to create an External References folder where you put your referenced dlls. Will keep this on my mind. As named it is only a hint path for the compiler, not a forcing reference.
First the GAC is searched for Oracle. It should work even if you delete the HintPath entirely. DCookie DCookie Just two steps to solve this issue.
Make sure all Dlls in your Bin is 32 bit version now Mazhar Abbas Mazhar Abbas 11 1 1 bronze badge. Is it in IIS or Project? David Spenard David Spenard 7 7 silver badges 9 9 bronze badges. This issue could by happen while using unmanaged oracle reference if you have more than one oracle client , or sometimes if you reference different version There is two way to solve it : First and fast solution is to remove unmanaged reference and use the managed one from NuGet see this before to go with this option Differences between the ODP.
DataAccess Right Click on Oracle. Eight hours is a long time for the bulb to light up. No wonder I always have to slog at work :. DiligentKarma DiligentKarma 4, 1 1 gold badge 27 27 silver badges 31 31 bronze badges. NET framework version 2. NET before publishing to Azure. In my case, I use VS , Oracle v11 64 bits. Also you can download and execute the install. This resolved my problem. I needed a bit version of oracle. DataAccess' or one of its dependencies.
I followed several steps above. Going to advance settings on the projects pool to toggle allow 32bit worked but I wasn't content to leave it like that so i turned it back on. My project also had references that relied on Elmah and log4net references. I downloaded the latest version of these and my project was able to build and run fine without messing with the pools's allow 32bit setting. In my case I had a console application, I just unchecked Prefer bit on Build projet properties tab and then I add this to my app.
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Could not load file or assembly "Oracle. DataAccess" or one of its dependencies Ask Question. Asked 8 years, 2 months ago. Active 27 days ago. Viewed k times. The operating system is windows 7. I also deleted all the Temporary ASP. I spend lot of hours resolving this issue, but still getting the same error again and again.
Anjali5 Anjali5 1 1 gold badge 8 8 silver badges 17 17 bronze badges. If using IIS Express this resolved it for me stackoverflow. Add a comment. Active Oldest Votes. I needed 32bit so I set mine to True, recycled the app pool, and that worked for me. I found the solution with following steps: remove the Oracle. Hope it helps. Saikat Daripa Saikat Daripa 3 3 silver badges 2 2 bronze badges. I don't have an Oracle. Me too. I use win 8. RDeveloper in. NET Framework 3. It helped to just remove and add reference to Oracle.
DataAccess not from GAC — alexkovelsky. Kifayat Ullah Kifayat Ullah 5 5 silver badges 14 14 bronze badges. The same worked for me in VS , incase anyone else might find that useful.
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