EF Mapping and metadata information could not be found for EntityType Error

Question

I have encountered an exception when I use Entity Framework 4.0 RC. My Entity Framework model is encapsulated in a private assembly who\'s name is Procurement.EFDataProvider

Answer 1

I was getting this error because I had more than edmx file in the same assembly with out proper use of custom namespaces.

Here is what is said about the exception in System.Data.Objects.ObjectContext

// Exceptions:

    //   System.InvalidOperationException:
    //     When the System.Data.Metadata.Edm.EntitySet from entitySetName
    //     does not match the System.Data.Metadata.Edm.EntitySet of the object’s
    //     System.Data.EntityKey.
    // -or-
    //     When the System.Data.Objects.ObjectContext.DefaultContainerName
    //     property is not set on the System.Data.Objects.ObjectContext and 
    //     the name is not qualified as part of the entitySetName parameter.
    // -or-
    //     When the specified type belongs to more than one entity set.