ServiceActivationException dues to compilation failure.

Question

 

Hello

 

I am working with DataServices and AJAX.  In the middle of a debugging session, I got an error from the AJAX client library.  "The data operation 'Customers' failed".  This was a surprise as it had worked several times so far this session.

 

So I tried the full URL: http://localhost:49177/WebSite2/Northwind.svc to check there wasn't a problem with the service and I got an assembly load error:

 

Could not load file or assembly 'App_Web_rdit6p3s, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.

 

Later on in the stack trace it shows:

 

[ServiceActivationException: The service '/WebSite2/Northwind.svc' cannot be activated due to an exception during compilation.  The exception message is: Could not load file or assembly 'App_Web_rdit6p3s, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified..]

 

The Northwind.svc is configured for IIS+WCF hosting as follows:

 

<%@ ServiceHost Language="C#" Factory="System.Data.Services.DataServiceHostFactory" Service="Northwind" %>

 

I have restarted the machine but the problem has not gone away.

 

Is there any way to track the operation of the server side components?

Thanks for any ideas

  Peter

 

Answer 1

The problem did not correct itself because of information cached in

C:\Windows\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files

 

Deleting the web site directory and forcing a recompile fixed the issue.

 

Answer 2

I was also able to fix this by opening my Entity Model, moving an entity around and then saving the edmx file. After that and building, the assembly error went away.