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  1. POIn ASP.Net, I sometimes get the following error - Viewstate verification failed. Reason: The viewstate supplied failed integrity check
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    <p>Background: I developed a web app in ASP.Net 3.5 in C#. It runs great but now a few users have reported that they recieve an error sometimes. I have tried to duplicate the error but it has been hard. One time though when I let the app sit I came back later and tried to move it along and it errored out. I would think that has something to do with the timeout but I am using the view state. </p> <p>Any ideas? When I look at the eventLog I do see the following error entry.</p> <p>Thank You for your help and ideas!</p> <p>John</p> <hr> <p>My event log has the following errors:</p> <p>Event code: 4005 </p> <p>Event message: Forms authentication failed for the request. Reason: The ticket supplied has expired. </p> <p>Event time: 14/03/2008 13:19:26 </p> <p>Event time (UTC): 14/03/2008 13:19:26 </p> <p>Event ID: d9f0333c2eed46e0b0207da69d2ea70e </p> <p>Event sequence: 154 </p> <p>Event occurrence: 5 </p> <p>Event detail code: 50202 </p> <hr> <p>Event code: 3005 </p> <p>Event message: An unhandled exception has occurred. </p> <p>Event time: 3/12/2009 7:49:59 AM </p> <p>Event time (UTC): 3/12/2009 11:49:59 AM </p> <p>Event ID: 590ac0f6ad734d988e9e02f0fb7800eb </p> <p>Event sequence: 52 </p> <p>Event occurrence: 1 </p> <p>Event detail code: 0 </p> <p>Application information: </p> <pre><code>Application domain: /LM/W3SVC/32/ROOT-1-128813294498061103 Trust level: Full Application Virtual Path: / Application Path: C:\Home\LocalUser\ucpga\Web\ Machine name: 169349-WEB2 </code></pre> <p>Process information: </p> <pre><code>Process ID: 6912 Process name: w3wp.exe Account name: NT AUTHORITY\NETWORK SERVICE </code></pre> <hr> <p>Here is the latest error:</p> <p>Event code: 4009 Event message: Viewstate verification failed. Reason: The viewstate supplied failed integrity check. Event time: 3/15/2009 10:26:27 PM Event time (UTC): 3/16/2009 2:26:27 AM Event ID: 3b5be134005e49c3b40400bcaa5cb48d Event sequence: 56 Event occurrence: 1 Event detail code: 50203 </p> <p>Application information: Application domain: /LM/W3SVC/32/ROOT-1-128816433841748972 Trust level: Full Application Virtual Path: / Application Path: C:\Home\LocalUser\ucpga\Web\ Machine name: 169349-WEB2 </p> <p>Process information: Process ID: 8892 Process name: w3wp.exe Account name: NT AUTHORITY\NETWORK SERVICE </p> <p>Request information: Request URL: <a href="https://hr.ucpga.org:443/application.aspx" rel="nofollow noreferrer">https://hr.ucpga.org:443/application.aspx</a> Request path: /application.aspx User host address: 74.160.64.222 User:<br> Is authenticated: False Authentication Type:<br> Thread account name: 169349-WEB2\ucpga </p> <p>ViewStateException information: Exception message: Invalid viewstate. Client IP: 74.160.64.222 Port: 1251 User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; GTB5; .NET CLR 1.1.4322; InfoPath.1) </p>
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