File Not Found Error?


When I execute one of the following scenarios, I get the error message "File Not Found":
- Site Actions -> Create
- Site Actions -> Edit Page -> Add a Web Part
- Site Actions -> Site Settings

And, by modifying the attribute "customErrors mode='On' " in the web.config file I got the following error message which explains more the problem:

File Not Found. at System.Reflection.Assembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection) at System.Reflection.Assembly.InternalLoad(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) at System.Reflection.Assembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) at System.Reflection.Assembly.Load(String assemblyString) at System.Web.Configuration.CompilationSection.LoadAssembly(String assemblyName, Boolean throwOnFail) at System.Web.UI.TemplateParser.AddAssemblyDependency(String assemblyName, Boolean addDependentAssemblies) at System.Web.UI.TemplateParser.ProcessDirective(String directiveName, IDictionary directive) at System.Web.UI.TemplateParser.ParseStringInternal(String text, Encoding fileEncoding)

But, when I checked for the relative files to "Create" (which is create.aspx) and "Site Settings" (which is settings.aspx) in "/12/TEMPLATES/LAYOUTS" folder, the files are well existing.

So what can be the problem? and how to resolve it?

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Uday EthirajuluCTOCommented:
did you made any changes to web.config? or by any tools

if yes,
refer :

pgirardierAuthor Commented:
No, this happened while testing a custom field type.

I followed the instruction in the suggested URL which consists in removing the extra xmlns attribute (xmlns="urn:schemas-microsoft-com:asm.v1") in the config file, but this did not resolve the problem.

Is there another method?
pgirardierAuthor Commented:
Well, I could resolve this problem basing on the described idea in this article:

And, I have read many articles about this error. But, all of theme could not be applied in my case. In fact, it seems that this error is very generic and it can be caused by many different causes like it is described in this blog:

Particularly, in my case, the problem is resolvd by copying the DLL file "Microsoft.SharePoint.ApplicationPages.dll" from "/12/CONFIG/BIN" to "/VirtualDirectories/80/_app_bin".

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