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I have a basic ASP.NET MVC2 site which logs a single "File does not exist" error every time a view (not partial views) is loaded. I am pretty sure this is because I am referencing a file, from the master page, that does not exist, but I cannot figure out which one it is.
The stack trace is not useful (see below). Does anyone have any tips on how to best debug this?
File does not exist. : at System.Web.StaticFileHandler.GetFileInfo(String virtualPathWithPathInfo, String physicalPath, HttpResponse response)
at System.Web.StaticFileHandler.ProcessRequestInternal(HttpContext context)
at System.Web.DefaultHttpHandler.BeginProcessRequest(HttpContext context, AsyncCallback callback, Object state)
at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
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Python raises this error because your program cannot continue running without being able to access the file to which your program refers. This error is usually raised when you use the os library. You will see an IOError if you try to read or write to a file that does not exist using an open() statement.
Opening a Non-Existent File. Using the built-in open function, you can try to open a file for reading (more on open in the next section). But the file doesn't exist, so this raises the IOError exception.
As you say, its probably a missing file or image referenced by your master page. To capture the error, add the following error handler to your Global.asax
protected void Application_Error(object sender, EventArgs e)
{
Exception ex = Server.GetLastError();
if (ex.Message == "File does not exist.")
{
throw new Exception(string.Format("{0} {1}", ex.Message, HttpContext.Current.Request.Url.ToString()), ex);
}
}
This should then tell you what resource the page is requesting
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