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Unexpected Problem Occurred!

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Detailed error information follows:

Date and Time:         4/19/2015 6:58:48 AM
Machine Name:          SECAP508
Process User:          NT AUTHORITY\NETWORK SERVICE
Remote User:           
Remote Address:        157.150.196.154
Remote Host:           157.150.196.154
URL:                   http://unstats.un.org/unsd/EconStatKB/KnowledgebaseArticle10414.aspx

NET Runtime version:   2.0.50727.8637
Application Domain:    /LM/W3SVC/3/Root/unsd/EconStatKB-1-130739085794843316
Assembly Codebase:     C:/WINDOWS/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll
Assembly Full Name:    System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
Assembly Version:      2.0.0.0
Assembly Build Date:   4/19/2015 4:07:27 AM

Exception Type:        System.ArgumentException
Exception Message:     An entry with the same key already exists.
Exception Source:      System
Exception Target Site: Add

---- Stack Trace ----
   System.Collections.Specialized.ListDictionary.Add(key As Object, value As Object)
       (unknown file): N 5250291
   System.Web.UI.ClientScriptManager.RegisterScriptBlock(key As ScriptKey, script As String, scriptBlocks As ListDictionary&, scriptList As ArrayList&, needsScriptTags As Boolean, inScriptBlock As Boolean&)
       (unknown file): N 00056
   System.Web.UI.ClientScriptManager.RegisterScriptBlock(key As ScriptKey, script As String, type As ClientAPIRegisterType)
       (unknown file): N 00093
   System.Web.UI.ClientScriptManager.RegisterClientScriptInclude(type As Type, key As String, url As String)
       (unknown file): N 00122
   System.Web.UI.ScriptRegistrationManager.RegisterClientScriptInclude(control As Control, type As Type, key As String, url As String)
       (unknown file): N 00066
   System.Web.UI.ScriptManager.RegisterClientScriptIncludeInternal(control As Control, type As Type, key As String, url As String)
       (unknown file): N 00018
   System.Web.UI.ScriptManager.RegisterScripts()
       (unknown file): N 00549
   System.Web.UI.ScriptManager.OnPagePreRenderComplete(sender As Object, e As EventArgs)
       (unknown file): N 00107
   System.EventHandler.Invoke(sender As Object, e As EventArgs)
       (unknown file): N 00000
   System.Web.UI.Page.OnPreRenderComplete(e As EventArgs)
       (unknown file): N 8793386
   System.Web.UI.Page.ProcessRequestMain(includeStagesBeforeAsyncPoint As Boolean, includeStagesAfterAsyncPoint As Boolean)
       (unknown file): N 01029


---- Collections ----

Cookies

    ASP.NET_SessionId             pbfdww55xz53myu3rn0le03e
    IKB_InstantKBLastVisit        4%2f19%2f2015+6%3a58%3a47+AM
    IKB_CurrentURL                %2funsd%2fEconStatKB%2fKnowledgebaseArticle10414.aspx
    IKB_InstantKBArticlesRead1041410414%7c4%2f19%2f2015+6%3a58%3a47+AM

ServerVariables

    APPL_MD_PATH                  /LM/W3SVC/3/Root/unsd/EconStatKB
    APPL_PHYSICAL_PATH            D:\Inetpub\wwwroot\unsd\EconStatKB\
    CONTENT_LENGTH                0
    GATEWAY_INTERFACE             CGI/1.1
    HTTPS                         off
    INSTANCE_ID                   3
    INSTANCE_META_PATH            /LM/W3SVC/3
    LOCAL_ADDR                    157.150.172.146
    PATH_INFO                     /unsd/EconStatKB/KnowledgebaseArticle10414.aspx
    PATH_TRANSLATED               D:\Inetpub\wwwroot\unsd\EconStatKB\KnowledgebaseArticle10414.aspx
    REMOTE_ADDR                   157.150.196.154
    REMOTE_HOST                   157.150.196.154
    REMOTE_PORT                   24632
    REQUEST_METHOD                GET
    SCRIPT_NAME                   /unsd/EconStatKB/KnowledgebaseArticle10414.aspx
    SERVER_NAME                   unstats.un.org
    SERVER_PORT                   80
    SERVER_PORT_SECURE            0
    SERVER_PROTOCOL               HTTP/1.0
    SERVER_SOFTWARE               Microsoft-IIS/6.0
    URL                           /unsd/EconStatKB/KnowledgebaseArticle10414.aspx
    HTTP_CONNECTION               Keep-Alive
    HTTP_ACCEPT                   text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
    HTTP_ACCEPT_ENCODING          identity
    HTTP_ACCEPT_LANGUAGE          en-us,en-gb,en;q=0.7,*;q=0.3
    HTTP_HOST                     unstats.un.org
    HTTP_USER_AGENT               CCBot/2.0 (http://commoncrawl.org/faq/)
    HTTP_X_FORWARDED_FOR          54.145.145.2