BC30560: 'default_aspx' is ambiguous in the namespace 'ASP'

Question

When I compiled my latest asp.net program and trying to run on the test server, I am getting this error

Line 46:             Dim dependencies() As String
Line 47:             CType(Me,Global.System.Web.UI.Page).AppRelativeVirtualPath = "~/default.aspx"
Line 48:             If (Global.ASP.default_aspx.__initialized = false) Then
Line 49:                 dependencies = New String(0) {}
Line 50:                 dependencies(0) = "~/default.aspx"


Source File: C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\ocbuild\c0c442ff\f0292c99\App_Web_default.aspx.cdcab7d2.4ubu1wgu.0.vb    Line: 48 

Detailed errors when I expand the compiler output...

Microsoft (R) Visual Basic Compiler version 8.0.50727.3053
for Microsoft (R) .NET Framework version 2.0.50727.3053
Copyright (c) Microsoft Corporation.  All rights reserved.

C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\ocbuild\c0c442ff\f0292c99\App_Web_default.aspx.cdcab7d2.4ubu1wgu.0.vb(48) : error BC30560: 'default_aspx' is ambiguous in the namespace 'ASP'.

            If (Global.ASP.default_aspx.__initialized = false) Then
                ~~~~~~~~~~~~~~~~~~~~~~~                            
C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\ocbuild\c0c442ff\f0292c99\App_Web_default.aspx.cdcab7d2.4ubu1wgu.0.vb(51) : error BC30560: 'default_aspx' is ambiguous in the namespace 'ASP'.

                Global.ASP.default_aspx.__fileDependencies = Me.GetWrappedFileDependencies(dependencies)
                ~~~~~~~~~~~~~~~~~~~~~~~                                                                 
C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\ocbuild\c0c442ff\f0292c99\App_Web_default.aspx.cdcab7d2.4ubu1wgu.0.vb(52) : error BC30560: 'default_aspx' is ambiguous in the namespace 'ASP'.

                Global.ASP.default_aspx.__initialized = true
                ~~~~~~~~~~~~~~~~~~~~~~~                     
C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\ocbuild\c0c442ff\f0292c99\App_Web_default.aspx.cdcab7d2.4ubu1wgu.0.vb(76) : error BC30560: 'default_aspx' is ambiguous in the namespace 'ASP'.

        Private Sub __BuildControlTree(ByVal __ctrl As default_aspx)
                                                       ~~~~~~~~~~~~ 
C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\ocbuild\c0c442ff\f0292c99\App_Web_default.aspx.cdcab7d2.4ubu1wgu.0.vb(100) : error BC30560: 'default_aspx' is ambiguous in the namespace 'ASP'.

            Me.AddWrappedFileDependencies(Global.ASP.default_aspx.__fileDependencies)
                                          ~~~~~~~~~~~~~~~~~~~~~~~                    
C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\ocbuild\c0c442ff\f0292c99\App_Web_default.aspx.cdcab7d2.4ubu1wgu.1.vb(31) : error BC30560: 'default_aspx' is ambiguous in the namespace 'ASP'.

            Return New ASP.default_aspx
                       ~~~~~~~~~~~~~~~~

I checked a few things and all of them turned out to be okay:

[*] Default is not defined twice anywhere

[*] Everything was working on the last release 1 week back

[*] There are no old files that are still staying with the compiled files. Also I cleared the temporary files many times.

[*] I have tried with other aspx files and all of them is giving ambiguous error (error in different source files...)

[*] The original source works just fine! only the error shows up on the compiled code.

Any ideas or any clues on how to resolve this ambiguity.

Thanks SK

Answer 1

I just solved this problem with the assistance following link: http://www.netomatix.com/development/usercontrols2.aspx

Add this on aspx or ascx page ClassName="MyModule"

   <%@ Control Language="vb" AutoEventWireup="false" CodeBehind="MyModule.ascx.vb" ClassName="MyModule" %>

Answer 2

Okay here is what I found after spending three days on this problem.

Finally I figured that if I removed all the projects from the solution except one (that was causing problem) I could isolated it to default.skin. The problem seemed to be very erratic because it started going away if I deleted certain lines from this file. However, this was not consistent and the problem came and went at random.

So after losing all hopes of fixing it in the code, I decided to try it another way. I changed the option of aspnet_compiler command from -prefix switch (a dll is created for each folder) to -o (all compiled ui is put in one dll), the problem went away!!!

It seems that the problem is due to some bug in the aspnet_compiler. It got triggered in this version somehow that I could not figure out.

I am thinking of moving to more stable asp.net 3.5SP1 (or maybe wait for asp.net 4.0) any suggestions?

Answer 3

I ran into this issue in consuming project when changing name/namespace of a library that consuming project referenced.

Issue is consuming project Bin folder has copy of DLL with each name/namespace name.

Deleting the consuming project Bin folder and rebuilding solved.