Entity Framework Error 0019

I’ve got this error while refactoring a project that contains an Entity Data Model.  I’ve tried to google and find good solution.  Here it is:

Errors:

BAModel.csdl(3,4) : error 0019: The EntityContainer name must be unique. An EntityContainer with the name 'BAEntities' is already defined.
BAModel.csdl(118,4) : error 0019: Each type name in a schema must be unique. Type name 'BAModel.Activity' was already defined.

One reason you might see this is if you have two models in a project that have the same schema. Maybe you decided to start your model over from scratch.

But in this scenario, that was not the case. It turned out that the problem was because I had changed the assembly name of the project that contained the model. The reference to the original assembly was still in the client application's BIN folder along with the new one.

Entity Framework was attempting to load the metadata files from both assemblies and detected the conflict.

Cleaning the project didn't fix the problem. The leftover assembly was still there.. I had to delete the dll and pdb file manually.

I first came across this problem and fixed it last week. But it happened again with another solution today and took me a while to remember the cause and the fix. The older I get, the more I need to rely on my blog for retaining that which my memory seems to be incapable of storing away.

Original solution

Sitecore - CryptographicException file not found

I’ve got an issue with CryptographicException file not found in Sitecore. See details below

Server Error in '/' Application.

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The system cannot find the file specified.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Security.Cryptography.CryptographicException: The system cannot find the file specified.
Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[CryptographicException: The system cannot find the file specified.
]
   System.Security.Cryptography.Utils.CreateProvHandle(CspParameters parameters, Boolean randomKeyContainer) +7715070
   System.Security.Cryptography.DSACryptoServiceProvider.ImportParameters(DSAParameters parameters) +258
   System.Security.Cryptography.DSA.FromXmlString(String xmlString) +501
   Sitecore.Nexus.Licensing.NexusLicenseApi.(String xml, Guid instance) +124
   Sitecore.Nexus.Licensing.NexusLicenseApi.GetSnapShot(Guid instance) +683
   Sitecore.SecurityModel.License.LicenseManager.GetSnapshotData(Guid instance) +47
   Sitecore.SecurityModel.License.LicenseManager.UpdateSnapshot() +70
   Sitecore.SecurityModel.License.LicenseManager.Initialize() +8
   Sitecore.Nexus.Web.HttpModule.Application_Start() +76
   Sitecore.Nexus.Web.HttpModule.Init(HttpApplication app) +435
   System.Web.HttpApplication.InitModulesCommon() +65
   System.Web.HttpApplication.InitModules() +43
   System.Web.HttpApplication.InitInternal(HttpContext context, HttpApplicationState state, MethodInfo[] handlers) +729
   System.Web.HttpApplicationFactory.GetNormalApplicationInstance(HttpContext context) +298
   System.Web.HttpApplicationFactory.GetApplicationInstance(HttpContext context) +107
   System.Web.HttpRuntime.ProcessRequestInternal(HttpWorkerRequest wr) +289

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Version Information: Microsoft .NET Framework Version:2.0.50727.4927; ASP.NET Version:2.0.50727.4927

After hours of trying to find the solution I’ve found out that this is IIS settings issue.   This issue was caused by MVC 2 installation, unfortunately it’s uninstall didn’t help.

To fix this:
1. go to IIS Manager
2. go to the application pool instance
3. click advanced settings
4. Under Process model, set Load User Profile to true
Hope this will help!
Eugene