I'm trying to use ASPNET Compiler in MSBuild.
For some reason it doesn't like it when I do a GET from MSBUILD and run ASPNET Compiler.

However, once I pull up the same Project in VS2005 and do a build. And then go back and call ASPNET Compiler, it is able to run fine. 

GLOBAL.ASAX file has the following:
<%@ Application Codebehind="Global.asax.vb" Inherits="Global" %>

Any help will be greatly appreciated. Thanks 

Are you using the AspNetCompiler task in your project file? Or are you doing it differently?

I tried it in my project file and with Visual Studio 2005 command prompt as well. None of them works

with msbuild, I wrote-
<AspNetCompiler Debug="false" VirtualPath="/build" PhysicalPath="$(Root)\myProject" TargetPath="$(Root)\mytarget" Updateable="false" />

For the VS2005 CommandPrompt, I wrote-
aspnet_compiler -p "c:\myproject" -v / "c:\mytarget"

What do you have in global.asax.vb?

Also, is this a "Web application project" or a "Web site"?

We had the same issue. Apparently has something to do with web application projects. This link explains it and has some keys to be added to the deploy project:

http://blogs.msdn.com/aaronhallberg/archive/2007/07/02/team-build-and-web-deployment-projects.aspx

Atomic mass Thanks for the tip. It did answer part of my question.
hongping- this is a web service project. Global.asax- is an empty shell. 
               Once I took it out it did the same to my service.asmx file

If anyone is interested, here is the Fix- It turns out that Asp_net compiler wants a "bin" folder with all the dll references inside the project (the one you are tyring to build).
But that was not happening when I just ran Asp_Net compiler.

Here is my script with the fix (this comes after you got the project to build):
ProjectName- the name of the project you are working on
DLL_Destination- the path to the dll your project is using.
$(SolutionRoot)- you might need to declare the property for this- e.g- c:\build... (to create a property refer-> http://msdn2.microsoft.com/en-us/library/63ckb9s9.aspx)
$(WebDirectory)- you need to declare this property. e.g. c:\Build\web...