So last night I finally decided to upgrade from DNN 4.3.5 to 4.4.1.  That upgrade went smooth as can be.  No problems!

Next I start to upgrade the modules that I use frequently.  The first was the Help module.  That upgrade went smooth as can be.  No problems!

Next module to upgrade was the Announcements module.  BAM!  Site broken!  Accessing the site's home page, even from the server console, all I get is "An error has occurred."

Of course I can't get into the site to check the log.  If I have to, I'll copy the site over to a development machine and try to troubleshoot it via Visual Studio.  But I don't have time for that.  I'm hoping someone here can help!

Here is what I get from the NT Event Viewer:

Event Type:    Error
Event Source:    Microsoft (R) Visual Basic Compiler
Event Category:    None
Event ID:    1000
Date:        2/13/2007
Time:        8:56:08 AM
User:        N/A
Computer:    SUPWEBSVR
Description:
The description for Event ID ( 1000 ) in Source ( Microsoft (R) Visual Basic Compiler ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. The following information is part of the event: vbc.exe, 8.0.50727.42, 4333eadd, vbc.exe, 8.0.50727.42, 4333eadd, 0, 0006843c.
Data:
0000: 41 00 70 00 70 00 6c 00   A.p.p.l.
0008: 69 00 63 00 61 00 74 00   i.c.a.t.
0010: 69 00 6f 00 6e 00 20 00   i.o.n. .
0018: 46 00 61 00 69 00 6c 00   F.a.i.l.
0020: 75 00 72 00 65 00 20 00   u.r.e. .
0028: 20 00 76 00 62 00 63 00    .v.b.c.
0030: 2e 00 65 00 78 00 65 00   ..e.x.e.
0038: 20 00 38 00 2e 00 30 00    .8...0.
0040: 2e 00 35 00 30 00 37 00   ..5.0.7.
0048: 32 00 37 00 2e 00 34 00   2.7...4.
0050: 32 00 20 00 34 00 33 00   2. .4.3.
0058: 33 00 33 00 65 00 61 00   3.3.e.a.
0060: 64 00 64 00 20 00 69 00   d.d. .i.
0068: 6e 00 20 00 76 00 62 00   n. .v.b.
0070: 63 00 2e 00 65 00 78 00   c...e.x.
0078: 65 00 20 00 38 00 2e 00   e. .8...
0080: 30 00 2e 00 35 00 30 00   0...5.0.
0088: 37 00 32 00 37 00 2e 00   7.2.7...
0090: 34 00 32 00 20 00 34 00   4.2. .4.
0098: 33 00 33 00 33 00 65 00   3.3.3.e.
00a0: 61 00 64 00 64 00 20 00   a.d.d. .
00a8: 66 00 44 00 65 00 62 00   f.D.e.b.
00b0: 75 00 67 00 20 00 30 00   u.g. .0.
00b8: 20 00 61 00 74 00 20 00    .a.t. .
00c0: 6f 00 66 00 66 00 73 00   o.f.f.s.
00c8: 65 00 74 00 20 00 30 00   e.t. .0.
00d0: 30 00 30 00 36 00 38 00   0.0.6.8.
00d8: 34 00 33 00 63 00 0d 00   4.3.c...
00e0: 0a 00                     ..     

This is the first of seven exceptions.  Let me know if I should post something else.

DotNetNuke.Services.Exceptions.PageLoadException: Unhandled error loading page.
System.Web.HttpCompileException: External component has thrown an exception.     at
System.Web.Compilation.AssemblyBuilder.Compile()     at
System.Web.Compilation.BuildProvidersCompiler.PerformBuild()     at
System.Web.Compilation.BuildManager.CompileWebFile(VirtualPath virtualPath)     at
System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile)     at
System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile)     at
System.Web.UI.TemplateControl.LoadControl(VirtualPath virtualPath)     at
System.Web.UI.TemplateControl.LoadControl(String virtualPath)     at
DotNetNuke.Framework.DefaultPage.LoadSkin(String SkinPath)

After digging around the EventLog table some more, I've identified the three unique exceptions that are occurring.  None of them state anything specific about the Announcements module.  However, all of them are trying to load the main page, which contains the Announcements module.  And everything worked until I updated the Announcements module.

I'm considering rolling back to the backup I took before upgrading to 4.4.  But I'd still love a solution to this issue.

Unhandled error loading page.
FileName
FileLineNumber 0
FileColumnNumber 0
Method System.Web.Compilation.AssemblyBuilder.Compile
StackTrace
Message DotNetNuke.Services.Exceptions.PageLoadException: Unhandled error loading page.
System.Web.HttpCompileException: External component has thrown an exception.     at
System.Web.Compilation.AssemblyBuilder.Compile()     at
System.Web.Compilation.BuildProvidersCompiler.PerformBuild()     at
System.Web.Compilation.BuildManager.CompileWebFile(VirtualPath virtualPath)     at
System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile)     at
System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile)     at
System.Web.UI.TemplateControl.LoadControl(VirtualPath virtualPath)     at
System.Web.UI.TemplateControl.LoadControl(String virtualPath)     at
DotNetNuke.Framework.DefaultPage.LoadSkin(String SkinPath)    
--- End of inner exception stack trace ---



Unhandled error loading page.
FileName
FileLineNumber 0
FileColumnNumber 0
Method System.Web.Compilation.BuildManager.PostProcessFoundBuildResult
StackTrace
Message DotNetNuke.Services.Exceptions.PageLoadException: Unhandled error loading page.
System.Web.HttpCompileException: External component has thrown an exception.     at
System.Web.Compilation.BuildManager.PostProcessFoundBuildResult(BuildResult result, Boolean keyFromVPP, VirtualPath virtualPath)     at
System.Web.Compilation.BuildManager.GetBuildResultFromCacheInternal(String cacheKey, Boolean keyFromVPP, VirtualPath virtualPath, Int64 hashCode)     at
System.Web.Compilation.BuildManager.GetVPathBuildResultFromCacheInternal(VirtualPath virtualPath)     at
System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile)     at
System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile)     at
System.Web.UI.TemplateControl.LoadControl(VirtualPath virtualPath)     at
System.Web.UI.TemplateControl.LoadControl(String virtualPath)     at
DotNetNuke.Framework.DefaultPage.LoadSkin(String SkinPath)    
--- End of inner exception stack trace ---



Object reference not set to an instance of an object.
FileName
FileLineNumber 0
FileColumnNumber 0
Method DotNetNuke.Framework.DefaultPage.Page_Init
StackTrace
Message DotNetNuke.Services.Exceptions.PageLoadException: Object reference not set to an instance of an object.
System.NullReferenceException: Object reference not set to an instance of an object.     at
DotNetNuke.Framework.DefaultPage.Page_Init(Object sender, EventArgs e)     at
System.Web.UI.Control.OnInit(EventArgs e)     at
System.Web.UI.Page.OnInit(EventArgs e)     at
DotNetNuke.Framework.PageBase.OnInit(EventArgs e)     at
System.Web.UI.Control.InitRecursive(Control namingContainer)     at
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)    
--- End of inner exception stack trace ---