title: Sys.WebForms.PageRequestManagerServerErrorException error on IE8
body: <p>I have 2 .aspx pages. 1. Reporter.aspx 2. Report.aspx
  Inside Reporter.aspx I have an IFRAME and Report.aspx is kept inside the IFRAME after submitting Report.aspx to server (to load report), I want to do another thing like showing some progress or something like that. My pages looks like the following</p>
  
  <p>Reporter.aspx:
  ....................</p>
  
  <pre><code>&lt;body style="margin:2px;"&gt;
      &lt;form id="Form1" runat="server"&gt;   
      &lt;dx:ASPxPopupControl ClientInstanceName="LoadingPanel" ID="LoadingPanel" HeaderText="Progress" runat="server" ShowCloseButton="false" CloseAction="None"
          PopupHorizontalAlign="WindowCenter" EnableClientSideAPI="true" PopupVerticalAlign="WindowCenter" ShowShadow="true" Modal="true"&gt;
          &lt;ContentCollection&gt;
              &lt;dx:PopupControlContentControl ID="PopupControlContentControl2" runat="server"&gt;
                  &lt;asp:Panel ID="Panel2" Height="75px" Width="275px" runat="server"&gt;
                      &lt;center&gt;
                          &lt;div id="dvStatus" style="width:100%; font-family:Verdana; font-size:10px; color:Red;" &gt;Loading....&lt;/div&gt;
                          &lt;div&gt;
                              &lt;img src="../Content/images/loading_big.gif" alt=""/&gt;
                          &lt;/div&gt;
                      &lt;/center&gt;       
                  &lt;/asp:Panel&gt;
              &lt;/dx:PopupControlContentControl&gt;
          &lt;/ContentCollection&gt;                        
      &lt;/dx:ASPxPopupControl&gt;
      &lt;/form&gt;
      &lt;div style="width:100%; overflow:hidden;"&gt;
          &lt;iframe id="IFrame2" style="width:100%; border:0px; height:1125px; overflow:hidden;" frameborder="0" src="Report.aspx"&gt;&lt;/iframe&gt;
      &lt;/div&gt;
  &lt;/body&gt;
  </code></pre>
  
  <p>Report.aspx:
  ..................</p>
  
  <pre><code>&lt;body style="overflow: hidden;"&gt;                   
      &lt;asp:ScriptManager ID="ScriptManager1" runat="server" AsyncPostBackTimeout="7200"&gt;
          &lt;/asp:ScriptManager&gt;
          &lt;asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional"&gt;
              &lt;ContentTemplate&gt;
                      &lt;div id="dvReportSettings" runat="server" style="float: left; width: 320px;" class="filterAndReport"&gt;                            
                              &lt;asp:UpdatePanel ID="UpdatePanel2" runat="server" UpdateMode="Conditional"&gt;
                                      &lt;ContentTemplate&gt;                                    
                                      &lt;/ContentTemplate&gt;
                                  &lt;/asp:UpdatePanel&gt;
                          &lt;/div&gt;
              &lt;dx:ASPxButton ID="btnGenerateReport" OnClick="btnGenerateReport_Click" Height="35px"
                              Width="100%" runat="server" Text="Generate" AutoPostBack="false"&gt;
                                  &lt;ClientSideEvents Click="function(s,e){ValidatePage(s,e)}" /&gt;
                          &lt;/dx:ASPxButton&gt;
          &lt;/ContentTemplate&gt;
          &lt;/asp:UpdatePanel&gt;                   
  &lt;/body&gt;
  </code></pre>
  
  <p>I have a button with ID="btnGenerateReport" and when I click it, it loads report. Some big reports take almost 2 hours to be generated and that is why I have 
  set AsyncPostBackTimeout="7200" inside asp:ScriptManager. It works perfectly in different browsers like FireFox, Google Chrome, Safari but not in IE. When I 
  click on Generate button using browser IE8, after few seconds it shows the following javascript error:</p>
  
  <p>Webpage error details</p>
  
  <p>User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; MDDC; .NET4.0C; .NET4.0E)
  Timestamp: Wed, 25 May 2011 10:47:06 UTC</p>
  
  <p>Message: Sys.WebForms.PageRequestManagerServerErrorException: An unknown error occurred while processing the request on the server. The status code returned from the server was: 12002
  Line: 4723
  Char: 21
  Code: 0
  URI: <a href="http://localhost:64191/ScriptResource.axd?d=p4fjjEQSSdv063Ae96jd9UCqVNGWjRlsLyZLXU0H9gBYlcdCHSPhZBNLbZ-4XLN3zCzBInKdXuLlu4E1PtquQ3YdrPS-9wlk1EreB5wn-imBkTqz02jjBS_01qg6c4ObcqXGRK8Ejgyb3pvKkcBSH5V7xOadF8Jl4MSwWwtSDUBqxwNH0&amp;t=fffffffff9d85fa6" rel="nofollow">http://localhost:64191/ScriptResource.axd?d=p4fjjEQSSdv063Ae96jd9UCqVNGWjRlsLyZLXU0H9gBYlcdCHSPhZBNLbZ-4XLN3zCzBInKdXuLlu4E1PtquQ3YdrPS-9wlk1EreB5wn-imBkTqz02jjBS_01qg6c4ObcqXGRK8Ejgyb3pvKkcBSH5V7xOadF8Jl4MSwWwtSDUBqxwNH0&amp;t=fffffffff9d85fa6</a></p>
  
  <p>Then I just put EnablePartialRendering="false" to asp:ScriptManager and tried to see if i can see some difference. After this, i click on Generate report button using
  IE8 and found another javascript error after just few seconds like 10-15. Here is the error:</p>
  
  <p>Webpage error details</p>
  
  <p>User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; 
  Media Center PC 6.0; MDDC; .NET4.0C; .NET4.0E)
  Timestamp: Wed, 25 May 2011 08:27:19 UTC</p>
  
  <p>Message: Unexpected call to method or property access.
  Line: 264
  Char: 5
  Code: 0
  URI: res://ieframe.dll/httpErrorPagesScripts.js</p>
  
  <p>Is there anyone who can help me getting out from this IE error. I am in serious trouble.</p>
  
  <p>Regrads,</p>
  
  <p>Mohin</p>