Help needed with deployment of ASP app with WCF calls on IIS

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Hello,

I have a problem when I deployed my ASP app on IIS. All pages not using WCF are running well. The site is also running well on the ASP.NET development server. But when a page is called which calls a WCF service, I got the following error:

Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information. Stack Trace:

C++

[ReflectionTypeLoadException: Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.]
   System.Reflection.RuntimeModule.GetTypes(RuntimeModule module) +0
   System.Reflection.RuntimeModule.GetTypes() +4
   System.Reflection.Assembly.GetTypes() +78
   VesselDesign.Common.TypeHelpers.TypeHelper.GetChilderen(Type aType, Boolean IncludeGenericTypes) in C:\VesselDesign\Common\VesselDesign.Helpers\TypeHelper.cs:102
   VesselDesign.Common.TypeHelpers.TypeHelper.GetChilderen(Type aType) in C:\VesselDesign\Common\VesselDesign.Helpers\TypeHelper.cs:88
   VesselDesign.BusinessLayer.Objects.BusinessObject.GetKnownTypes() in C:\VesselDesign\VesselDesign.BusinessLayer.Objects\BusinessObject.cs:530

The class of the object has a KnowType attribute which has the GetKnownTypes method as a parameter. This method will dynamicly retrieves all descendends of this class and returns them. It uses reflection ( with a call to System.AppDomain.CurrentDomain.GetAssemblies() ) to retrieve the descendends. I think this is causing the problem and it possibly something with security, but what???

Can anyone please help me with this?

Thanks a lot!!!!

Marco

Posted 2-Jan-11 20:24pm

mdn999

Updated 2-Jan-11 20:30pm

Keith Barrow

v4

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Keith Barrow · Answer 1 · 2011-01-02T20:45:00

This really is one of Microsoft's finest error messages isn't it. :-)
I did a quick google for "Retrieve the LoaderExceptions property for more information", I suggest you do the same a quite a few people have the same error message, but with differing causes.
These range from different compilation target frameworks in release/debug to a referenced assembly being missing to just a plain old rebuild needed.

This[^] seemed to have quite a few answers to the various causes.

I'll 5 your question, hopefully someone else will have a better answer.