EDM wizard trouble shooting

Check the trouble shooting cases, if you have problems on using Entity Data Model wizard in Vs2012/Vs2013:

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Case 1: The wizard disappears, when we click [Next]

Point:

• You need to use same version of Npgsql: GAC's Npgsql and project's Npgsql.

How to fix?

• If you use 2.2.3.0 installer, use 2.2.3.0 Npgsql and Npgsql.EntityFramework in your project.
• If you use 2.2.4.3 installer, use 2.2.4.3 Npgsql and Npgsql.EntityFramework in your project.

Note:

• The installers are available at https://github.com/npgsql/npgsql/releases

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Case 2: The dialog says "A compatible provider not found".

Message:

• Your project references the latest version of Entity Framework; however, an Entity Framework database provider compatible with this version could not be found for your data connection.
• If you have already installed a compatible provider, ensure you have rebuilt your project before performing this action.
• Otherwise, exit this wizard, install a compatible provider, and rebuild your project before performing this action.

Point:

• Check <provider> section at your project's App.config or Web.config.

How to fix? 1

• Remove version indication from type attribute.
• For example: <provider invariantName="Npgsql" type="Npgsql.NpgsqlServices, Npgsql.EntityFramework" />

How to fix? 2

• Specify a full type specification.
• For example: <provider invariantName="Npgsql" type="Npgsql.NpgsqlServices, Npgsql.EntityFramework, Version=2.2.3.0, Culture=neutral, PublicKeyToken=5d8b90d52f46fda7" />

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References:

• https://github.com/npgsql/npgsql/issues/445#issuecomment-74373222