> Let me Google that for you:http://blog.cincura.net/233101-error-could-not-load-type-system-runtime-compilerservices-extensionattribute-from-assembly-mscorlib-version4-0-0-0-cultureneutral-publickeytokenb77a5c561934e089-on-net-4-0-net-4-5/.--

Jiri, a Google search, unfortunately, did not solve my problem. I got another clean computer, installed VS 2010, Framework 4.0 and Firebird provider 3.0.2.0 (version 2 January 2013). I created another project, ie not any remnant of Framework 4.5 and when preparing to show items from the database to create a new entity, from scratch, no extra references, remains the following error:

An error occurred while connecting to the database. The database might be unavailable. An exception of type 'System.Data.ProviderIncompatibleException' occurred. The error message is: 'The store data provider failed to return information for the StoreSchemaDefinition request. See the inned exception for details. The inner exception caught was of type 'System.MissingFieldExceptionExeption', with this erros message: 'Field not found: System.Data.Common.DbProviderManifest.ConceptualSchemaDefinitionVersion3'.

The question is: why is ConceptualSchemaDefinitionVersion3 being called in FW4.5 assembly if my application is not FW4.5, it is FW4.0??

I'm picturing the situation you have in your computer the FW4.5 and these errors do not appear in your installation. Just a guess.

All I know is that my project can't go on because the provider is not working as expected.

Thanks,
Marco Castro

----- Original Message -----
From: Jiri Cincura [mailto:disk...@cincura.net]
To: firebird-net-provider@lists.sourceforge.net
Sent: Wed, 2 Jan 2013 09:44:32 +0100
Subject: Re: [Firebird-net-provider] FW: What is this error: Field notfound:System.Data.Common.DbProviderManifest.ConceptualSchemaDefinitionVersion3

On Wed, Jan 2, 2013 at 12:27 AM, Marco Aurélio Castro <mcas...@mcsoft.com.br> wrote: > When executing a Stored Procedure is the error message: "Could not load type > 'System.Runtime.CompilerServices.ExtensionAttribute' from assembly > 'mscorlib, Version = 4.0.0.0, Culture = neutral, PublicKeyToken = > b77a5c561934e089'." This error is related to the existence of the Net 4.5, > right? Let me Google that for you: http://blog.cincura.net/233101-error-could-not-load-type-system-runtime-compilerservices-extensionattribute-from-assembly-mscorlib-version4-0-0-0-cultureneutral-publickeytokenb77a5c561934e089-on-net-4-0-net-4-5/.-- Jiri {x2} Cincura (x2develop.com founder) http://blog.cincura.net/ | http://www.ID3renamer.com------------------------------------------------------------------------------Master Java SE, Java EE, Eclipse, Spring, Hibernate, _javascript_, jQuery and much more. Keep your Java skills current with LearnJavaNow - 200+ hours of step-by-step video tutorials by Java experts. SALE $49.99 this month only -- learn more at: http://p.sf.net/sfu/learnmore_122612 _______________________________________________ Firebird-net-provider mailing list Firebird-net-provider@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/firebird-net-provider
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