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Package 'ElementHost Designer Package' has failed to load properly

Topics: Developer Forum
Sep 2, 2009 at 8:20 PM
Edited Sep 3, 2009 at 1:37 AM

I receive the following message when I open Models\TheBeerHouse.dbml:

Package Load Failure

Package 'ElementHost Designer Package' has failed to load properly (GUID = xxx). Please contact package vendor for assistance. Application restart is recommended, due to possible environment corruption.

My environment is:

Windows Vista Ultimate

Visual Studio 2008 Version 9.0.30729.1 SP

.NET Framework 3.5 SP1

ASP.NET MVC framework (1.0)

Microsoft SQL Server Enterprise 10.0.2531.0

Microsoft SQL Server Management Studio Basic 10.0.2531.0
Microsoft Data Access Components (MDAC)      6.0.6002.18005
Microsoft MSXML      3.0 5.0 6.0
Microsoft Internet Explorer      7.0.6002.18005
Microsoft .NET Framework      2.0.50727.4016
Operating System      6.0.6002

Sep 4, 2009 at 4:55 PM

Well right off the bat this program is designed for SQL Server Express, and since you have enterprise you are going to have to manually mount the database yourself and then update the web.config connection string. Hope that helps.

Sep 4, 2009 at 5:29 PM
Edited Sep 10, 2009 at 1:57 PM

This error occurs when Visual Studio's Toolbox is instantiated.

Given that this is a Visual Studio issue, I have created a post on for this problem. You may find it here: