Entity Data Model Wizard Crash with Oracle Connection Entity Data Model Wizard Crash with Oracle Connection oracle oracle

Entity Data Model Wizard Crash with Oracle Connection


Thanks to @Hong-vit pointing me in the right direction. I found the answer.

When you visit the download page for ODAC you're given a selection of version numbers.

In my case the top two were:

  • ODAC 12.2c Release 1 and Oracle Developer Tools for Visual Studio (12.2.0.1.0)
  • ODAC 12c Release 4 and Oracle Developer Tools for Visual Studio (12.1.0.2.4)

For me the top one wouldn't install. It would cut out during the installation process (thanks Oracle!) so I settled with the second one (12.1.0.2.4).

This meant that when I installed Oracle.ManagedDataAccess and Oracle.ManagedDataAccess.EntityFramework I had to select the correct version.

Not for me:

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The one I needed

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As you can see the version numbers (almost!) match up:

  • ODAC 12.2.0.1.0 = Oracle.ManagedDataAccess 12.2.1100
  • ODAC 12.1.0.2.4 = Oracle.ManagedDataAccess 12.1.24160719 (yay!)

I believe this is a failing on oracles behalf as it's not made clear despite their inclusion on a page long readme on which this doesn't feature. In additon the version numbers not quite being the same...but that's a rant for the blog.


I have the same bug. I fixed it successfully by follow this step:

On your project Right click -> Select Manage NuGet packages on Browse tab input oracle. You will see Oracle.ManagedDataAccess.EntityFramework. Select version of oracle you have installed. This should be 12.1.2400. Install it, you are done


I had the same issue - I hope I can help fellow Googlers having the unfortunate task of connecting Oracle and Visual Studio.

I followed the steps and still got crashes - because I was using VS2017 (I understand that the questions is tagged VS2015). You'll need to install the VS2017 ODAC Client. Thankfully, this one actually does something when you begin the installation. The installer in the link on the accepted answer will only work for VS2015.

The most recent version (as of this time of writing) of ODP.NET is 18.3, which can be installed through NuGet (Oracle.ManagedDataAccess.EntityFramework). Follow these steps on Oracle's website and you'll be setup.

...Or so you think. I got the same error as in this stack overflow question, where it won't go past the Entity Data Model Wizard.

I applied every configuration in the selected answer, but it still wouldn't work. When I downgraded my Oracle.ManagedDataAccess.EntityFramework from 18.3.0 to 12.2.1100, I could finally create my models!