Entity Framework - Already Defined

user_30512 0
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I have a problem with an EDMX file which I've never encountered before. Seemingly randomly when the site is running or I'm debugging, the EF will bomb out and complain that everything is re-defined. I have to restart the app pool and re-attach the debugger every time, then start again from where I left off, after which it works again until the next time it bombs out.

I've already recreated the EDMX with a different name, hence MyAppEntities*1*

The error is:

Error: Schema specified is not valid. Errors: App_Code.Fck.csdl(3,4) : 
error 0019: The EntityContainer name must be unique. An EntityContainer with the name 'MyAppEntities1' is already defined. App_Code.Fck.csdl(69,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.AdSection' was already defined. App_Code.Fck.csdl(79,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.AgeRating' was already defined. App_Code.Fck.csdl(89,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.Comment' was already defined. App_Code.Fck.csdl(101,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.ContentImage' was already defined. App_Code.Fck.csdl(115,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.ContentVideo' was already defined. App_Code.Fck.csdl(126,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.FeaturePlan' was already defined. App_Code.Fck.csdl(142,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.Flick' was already defined. App_Code.Fck.csdl(165,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.Gallery' was already defined. App_Code.Fck.csdl(184,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.Genre' was already defined. App_Code.Fck.csdl(197,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.Like' was already defined. App_Code.Fck.csdl(208,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.Meta' was already defined. App_Code.Fck.csdl(216,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.Payment' was already defined. App_Code.Fck.csdl(236,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.StatusUpdate' was already defined. App_Code.Fck.csdl(246,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.UserProfile' was already defined. App_Code.Fck.csdl(277,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.FK_FeaturePlans_AdSections' was already defined. App_Code.Fck.csdl(289,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.FK_Flicks_AgeRatings' was already defined. App_Code.Fck.csdl(301,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.FK_Comments_Users' was already defined. App_Code.Fck.csdl(313,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.FK_Payments_FeaturePlans' was already defined. App_Code.Fck.csdl(325,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.FK_Flicks_Users' was already defined. App_Code.Fck.csdl(337,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.FK_Genres_Genres' was already defined. App_Code.Fck.csdl(349,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.FK_Likes_Users' was already defined. App_Code.Fck.csdl(361,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.FK_Payments_Users' was already defined. App_Code.Fck.csdl(373,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.FK_StatusUpdates_Users' was already defined. App_Code.Fck.csdl(385,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.FlickGenres' was already defined. App_Code.Fck.csdl(389,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.User' was already defined. App_Code.Fck.csdl(401,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.FK_Users_be_Users' was already defined. App_Code.Fck.csdl(413,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.ContentImageSet' was already defined. App_Code.Fck.csdl(426,4) : 
error 0019: Each type name in a schema must be unique. Type name 'FckModel.FK_ContentImages_ContentImageSets' was already defined.
edmx entity-framework-4 entity-framework .net c#
10 Answers

I faced this exception recently and the solution to this problem is to delete an old DLL or duplicate DLL referenced in your solution Bin folder. This completely solved my problem.

user_109270510

After digging for 2 days finally I found the cause of the problem. I had 2 dll's (database application) which pointing to same entity framework database in the same project. In short it had duplicate dll's for one database. After removing irrelevant dll, it started working fine.

user_18470040
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