Sharepoint 2013, event receiver to rename files not working

Question

I coded an event receiver (ItemAdding) that renames for example a .txt file to a .text file (it does not matter the extensions, it is just an example). In my code what I do is to an SPFile.MoveTo operation. It works fine in SP2010 but when I execute
the same code in SP 2013, when the operation is done using IE I get the text "Sorry, something went wrong" and then "File Not Found".
In the logs this is what I see:
12/23/2013 15:48:49.16  w3wp.exe (0x17B0)                        0x0AC8 SharePoint Foundation        
 General                        ai1wu Medium   System.IO.FileNotFoundException: The system cannot find the file specified.
(Exception from HRESULT: 0x80070002), StackTrace:    at Microsoft.SharePoint.SPWeb.GetFileOrFolderProperties(String strUrl, ListDocsFlags listDocsFlags, Boolean throwException, SPBasePermissions& permMask)     at Microsoft.SharePoint.SPFile.PropertiesCore(Boolean
throwException)     at Microsoft.SharePoint.SPFile.get_Length()     at Microsoft.Office.RecordsManagement.PolicyFeatures.ApplicationPages.UploadPage.OnSubmit(Object o, EventArgs e)     at Microsoft.Office.RecordsManagement.PolicyFeatures.ApplicationPages.UploadExPage.OnSubmit(Object
o, EventArgs e)     at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)     at System.Web.UI.Page.ProcessReque... f72b639c-77b1-5045-c3a2-b23f24ae71c0
It's clear that the Sharepoint upload code tries to do things with the original name and it does not realize that it was renamed.
Can I do something from my event receiver code like using the AfterProperties to bypass this error?
Thanks

Answer 1

Hi Dennis,
The issue still persists. Here is the code:
        public override void ItemAdded(SPItemEventProperties properties)
            SPSecurity.RunWithElevatedPrivileges(delegate()
                try
                    OutputDebugStringA("Inside ItemAdded");
                    string szHttpUrl = properties.WebUrl + "/" + properties.AfterUrl;
                    SPWeb openedWeb = properties.Web.Site.OpenWeb(properties.Web.ID);
                    SPFile spf = openedWeb.GetFile(szHttpUrl);
                    EventFiringEnabled = false;
                    string szUrl = properties.AfterUrl;
                    szUrl = szUrl + ".renamed";
                    string szNewFileName;
                    if (szUrl.LastIndexOf('\\') != -1) szNewFileName = szUrl.Substring(szUrl.LastIndexOf('\\') + 1);
                    else if (szUrl.LastIndexOf('/') != -1) szNewFileName = szUrl.Substring(szUrl.LastIndexOf('/') + 1);
                    else szNewFileName = szUrl;
                    if (properties.ListItem != null)
                        properties.ListItem["Title"] = szNewFileName;
                        properties.ListItem.Update();
                    spf.MoveTo(szUrl);
                    EventFiringEnabled = true;
                    base.ItemAdded(properties);
                    OutputDebugStringA("Renaming to " + szUrl);
                catch (System.Exception exception)
                    OutputDebugStringA("ItemAdded ERROR: " + exception.ToString());