I get this error every now and then on my site, if you just go back and re input the same data it gets updated just fine:
Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 2/10/2015 12:09:19 PM
Event time (UTC): 2/10/2015 6:09:19 PM
Event ID: 4ed080d4dcc7487a8ced183224b3612e
Event sequence: 1596
Event occurrence: 6
Event detail code: 0
Application information:
Application domain: /LM/W3SVC/1/ROOT/RefreshDB-1-130680401906553347
Trust level: Full
Application Virtual Path: /RefreshDB
Application Path: D:\RefreshDB\
Machine name: Servername
Process information:
Process ID: 7184
Process name: w3wp.exe
Account name: IIS APPPOOL\.NET v4.5
Exception information:
Exception type: ArgumentOutOfRangeException
Exception message: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
at System.Collections.ArrayList.get_Item(Int32 index)
at System.Collections.Specialized.OrderedDictionary.get_Item(Int32 index)
at ASP._Page_RefreshDataupdate_vbhtml.Execute() in D:\RefreshDB\RefreshDataupdate.vbhtml:line 725
at System.Web.WebPages.WebPageBase.ExecutePageHierarchy()
at System.Web.WebPages.WebPage.ExecutePageHierarchy()
at System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage)
at System.Web.WebPages.WebPageHttpHandler.ProcessRequestInternal(HttpContextBase httpContext)