Error 2002 : The EntityContainer 'X' for the storage model specified as part of this MSL does not exist in MetadataWorkspace

Question

I'm trying to integrate my Oracle Database into my ASP.NET app, but I keep getting this error :

Error 2002: The EntityContainer 'OracleDBTargetContainer' for the storage model specified as part of this MSL does not exist in MetadataWorkspace.

I've tried everything I could think of but still can't figure out what's wrong. What can I do to diagnose the root cause of this?

This is still new to me so I might miss something very obvious.

I'm assuming it my not like my database as the Diagram displayed when I integrated another DB. I've checked the foreign keys, primary keys, ... but to no good.

Using VS2013 with ODP.NET 12c Release 3.

EDIT : My EntityContainerMapping is empty, is that normal?

<EntityContainerMapping CdmEntityContainer="PMModelContainer" StorageEntityContainer="PMModelTargetContainer"></EntityContainerMapping>

Answer 1

I found what was wrong.

One of my foreign key didn't match the primary key (Number 20 instead of Number 10)

I saw on stack overflow that it could be a problem and checked my tables but I missed that one obviously.

How did I realize it ? Well because rather than creating the EF Designer, I chose the Code First from database option, and, oh, what do you know, the error message now tells you EXACTLY what the problem is ! (Table names and columns).