Validation of viewstate MAC failed

There is a small problem with a big faliure.. in the <form action ="default2.aspx">tag when i click the buuton
it shows the error has
Server Error in '/' Application.
Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies
the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.
http://go.microsoft.com/fwlink/?LinkID=314055
in this page i have already done local system in the inetmgr.
also i just switch to add two no from visual studio.
pls its very kiiling.
i have generated a machine key decrytion keys and all added to web.config in <system.web> but same problem.and also see
?xml version="1.0"?>

<configuration>
in this link also in the iis i configured now localsystem but this is not going from web.config i dont think even re install will
solve out the problem.
Hi,
I am afraid that for web development issues, I would recommend you post them in
https://forums.asp.net forum to get dedicated supports.
In addition, you could have a check whether the following blog helps.
http://blogs.msdn.com/b/tom/archive/2008/03/14/validation-of-viewstate-mac-failed-error.aspx
Regards.
We are trying to better understand customer views on social support experience, so your participation in this interview project would be greatly appreciated if you have time. Thanks for helping make community forums a great place.
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Just updated to 3.6.8. Now can't navigate reliably. Frequently get this error message: "Server Error in '/' Application. Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies th

Just updated to 3.6.8. Now can't navigate reliably. Frequently get this error message: "Server Error in '/' Application. Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster." Pending fix of this glitch, is there a way to go back to previous version of Firefox that worked perfectly well?
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Hi JH,
According to your description, my understanding is that you got an error when you deleted columns in SharePoint 2010.
Please add the following string in <system.web> section of your web.config file :
<pages validateRequest="false" enableEventValidation="false" viewStateEncryptionMode ="Never" />
Note: before changing web.config, please make a backup for the file.
Here are some similar posts for you to take a look at:
http://forums.asp.net/p/1355367/2778642.aspx
http://forums.asp.net/t/1166634.aspx
I hope this helps.
Thanks,
Wendy
Wendy Li
TechNet Community Support

Upon logoff from web-site this error occurs: Validation of viewstate MAC failed.

I know not who owns the spurious error, my-install, the WEB-site, or Firefox. The circumstance is the clicking of log-out. None the less documentation is included. Dennis.

Thank you for the direction, I know now where to go. Your stewardship is appreciated.
PS 1st shot at this 'board' thing, I followed with a click on solved-it & found that my vote was in error.

ICal yields "Error during PUT for mailto:valid@email: iMIP request failed"

Hello,
I'm trying to bring up an iCal server (using Mac OS X Lion 10.7.3 Server on a Mac Mini). The basic configuration runs fine. But when I tried to enable eMail invitations, I got stuck with those messages in the error log:
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[twistedcaldav.scheduling.scheduler.ScheduleResponseQueue#error] Error during PUT for mailto:valid@email: iMIP request failed
My configuration settings:
calendar:Scheduling:CalDAV:EmailDomain = ""
calendar:Scheduling:CalDAV:HTTPDomain = ""
calendar:Scheduling:CalDAV:AddressPatterns = _empty_array
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calendar:Scheduling:iMIP:Sending:UseSSL = no
calendar:Scheduling:iMIP:Sending:Username = "valid@email"
calendar:Scheduling:iMIP:Sending:Address = "valid@email"
calendar:Scheduling:iMIP:Sending:Password = "safe_password"
calendar:Scheduling:iMIP:Sending:Port = 25
calendar:Scheduling:iMIP:Enabled = yes
calendar:Scheduling:iMIP:MailGatewayPort = 62310
calendar:Scheduling:iMIP:Receiving:Server = "valid.mail.server"
calendar:Scheduling:iMIP:Receiving:UseSSL = yes
calendar:Scheduling:iMIP:Receiving:Username = "valid_email"
calendar:Scheduling:iMIP:Receiving:PollingSeconds = 30
calendar:Scheduling:iMIP:Receiving:Type = "imap"
calendar:Scheduling:iMIP:Receiving:Password = "safe_password"
calendar:Scheduling:iMIP:Receiving:Port = 993
calendar:Scheduling:iMIP:AddressPatterns:_array_index:0 = "mailto:.*"
calendar:Scheduling:iMIP:MailGatewayServer = "valid.mail.server"
calendar:Scheduling:iSchedule:Enabled = no
calendar:Scheduling:iSchedule:Servers = "servertoserver.xml"
calendar:Scheduling:iSchedule:AddressPatterns = _empty_array
It does not even try to connect to the given smtp server. How do I proceed?

I dug into the sources, and am now smarter
the above settings are invalid, because of the gateway (this has to be iCal itself):
calendar:Scheduling:iMIP:MailGatewayServer = "localhost"
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[mailgateway] 2012-03-27 11:14:37+0200 [IMAP4DownloadProtocol,client] [twistedcaldav.mail.IMAP4DownloadFactory#debug] Scheduling next IMAP4 poll
[mailgateway] 2012-03-27 11:15:07+0200 [IMAP4DownloadProtocol,client] [twistedcaldav.mail.IMAP4DownloadProtocol#debug] RECEIVED: * OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE AUTH=PLAIN AUTH=LOGIN] Dovecot ready.
[mailgateway] 2012-03-27 11:15:07+0200 [IMAP4DownloadProtocol,client] [twistedcaldav.mail.IMAP4DownloadProtocol#debug] IMAP servergreeting
[mailgateway] 2012-03-27 11:15:07+0200 [IMAP4DownloadProtocol,client] [twistedcaldav.mail.IMAP4DownloadProtocol#debug] SENDING: 0001 AUTHENTICATE PLAIN
[mailgateway] 2012-03-27 11:15:07+0200 [IMAP4DownloadProtocol,client] [twistedcaldav.mail.IMAP4DownloadProtocol#debug] RECEIVED: +
[mailgateway] 2012-03-27 11:15:07+0200 [IMAP4DownloadProtocol,client] [twistedcaldav.mail.IMAP4DownloadProtocol#debug] SENDING: 1GNhbEwhZHNwZXJ0LmRlAFlpZXE5YW==
[mailgateway] 2012-03-27 11:15:09+0200 [IMAP4DownloadProtocol,client] [twistedcaldav.mail.IMAP4DownloadProtocol#debug] RECEIVED: 0001 NO [AUTHENTICATIONFAILED] Authentication failed.
[mailgateway] 2012-03-27 11:15:09+0200 [IMAP4DownloadProtocol,client] [twistedcaldav.mail.IMAP4DownloadProtocol#debug] IMAP authenticate failed for valid@email, trying login
[mailgateway] 2012-03-27 11:15:09+0200 [IMAP4DownloadProtocol,client] [twistedcaldav.mail.IMAP4DownloadProtocol#debug] SENDING: 0002 LOGIN "valid@email" "valid_password"
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Urgent: MAC fails issue

Hi ,
I would like to ask this question again to oaf top users/gurus( Tapash Ray ,Shiv Saroj,Mukul Gupta,Ramkumar Sekar,Sumit Sharma, avajain, Srinath Mani) to put some light on this issue. Many thanks!
 
Hi OAF Guru's
 
My goal is to communicate between projects screen and ESRI MAP.
If I want to click on a button in the projects screen then I want to zoom in to a group of geometry regions in the ESRI MAP.
If I want to click in the ESRI MAP in a region then I want to do something in projects screen such as navigating to another projects screen etc.
 
To realize this goal: 
I have extended a standard Projects page and add a region to show a ESRI GIS map.
 
To be exact:
 
ProjectSetDetailsPG
PA_PROJECT_SET_DETAILS_LAYOUT: (Region Style: PageLayout) 
...... 
<my additions> 
GisMapHdrRN: (Region Style: header) 
GisMapRN: (Region Style: messageComponentLayout) 
messageLayout1(type:) 
MapRawText (type: rawText 
 
Behind the GisMapRN I have added a Controller. 
 
In the Controller I do the next: 
 
..... 
public void processRequest(OAPageContext oapagecontext, OAWebBean oawebbean) 
{ 
super.processRequest(oapagecontext, oawebbean); 
prepareEsriMap(oapagecontext, oawebbean); 
} 
public void processFormRequest(OAPageContext oapagecontext, OAWebBean oawebbean) 
{ 
super.processFormRequest(oapagecontext, oawebbean); 
} 
private void prepareEsriMap(OAPageContext oapagecontext, OAWebBean oawebbean) 
{ 
String project_set_id = oapagecontext.getParameter("paProjectSetId"); 
String url = "OA.jsp?akRegionCode=PA_PROJECT_HOME_LAYOUT&akRegionApplicationId=275&addBreadCrumb=RS&paProjectId=\"+projectId+\"&retainAM=Y"; 
OAUrl urlObject = new OAUrl(url); 
OARenderingContext renderingcontext = oapagecontext.getRenderingContext(); 
String destURL = urlObject.createURL(renderingcontext); 
StringBuffer stringbuffer = new StringBuffer(); 
stringbuffer.append("<HTML xmlns='http://www.w3.org/1999/xhtml' xmlns:v='urn:schemas-microsoft-com:vml'> \n"); 
stringbuffer.append(" <HEAD> \n"); 
stringbuffer.append(" <meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\"/> \n"); 
stringbuffer.append(" <script type=\"text/javascript\" src=\"http://serverapi.arcgisonline.com/jsapi/arcgis/?v=1\"></script> \n"); 
stringbuffer.append(" <script type=\"text/javascript\" src=\"http://dbr4004v.dbr.agro.nl:8080/ebs/javascript/ebs.js\"></script> \n"); 
stringbuffer.append(" <script type=\"text/javascript\"> \n"); 
stringbuffer.append(" function getProject(projectId) { \n"); 
stringbuffer.append(" window.location=\"").append(destURL).append("\"; \n"); 
stringbuffer.append(" } \n"); 
stringbuffer.append(" </script> \n"); 
stringbuffer.append(" </HEAD> \n"); 
stringbuffer.append(" <BODY> \n"); 
stringbuffer.append(" <input type=\"button\" value=\"Show Projects\" onclick=\"zoomToProjectSet(").append(project_set_id).append(");\"/> \n"); 
stringbuffer.append(" \n"); 
stringbuffer.append(" <div id=\"mapDiv\" style=\"width:1000px; height:500px; border:1px solid #000;\"></div> \n"); 
stringbuffer.append(" </BODY> \n"); 
stringbuffer.append("</HTML> \n"); 
..... 
 
If I navigate via responsibility: Project Super User and via the path: Project Sets > Click one of the Project Set Name > then I can see the adapted Project Sets screen with stadard Projects region and below that the new added ESRI map region. 
The new region has a button to zoom in in the ESRI map and the ESRI map itself with some geometry information. 
The functionality of button is as working expected: (zoomToProjectSet(project_set_id) ). 
But when I click one of the geometry region to call for example Project Overview screen then I get the error message: 
"You have insufficient privileges for the current operation. Please contact your System Administrator.
You cannot run a page which is not SelfSecured when the MAC fails."
 
It is remarkable if I click the Project Name links in the Project Overview screen these have all different oas text 
OA_HTML/OA.jsp?_rc=PA_PROJECT_HOME_LAYOUT&_ri=275&addBreadCrumb=RS&paProjectId=4832&_ti=2094430068&oapc=3&oas=l305LKdSwzg9iJqy8q00ew.. 
OA_HTML/OA.jsp?_rc=PA_PROJECT_HOME_LAYOUT&_ri=275&addBreadCrumb=RS&paProjectId=4869&_ti=2094430068&oapc=3&oas=xO_5dM4O-mKT38E1En5Msg.. 
OA_HTML/OA.jsp?_rc=PA_PROJECT_HOME_LAYOUT&_ri=275&addBreadCrumb=RS&paProjectId=4850&_ti=2094430068&oapc=3&oas=u_yW8yP1uMTQoffa7Vy2hA.. 
 
When click the ESRI map region which try to reproduce same action as Project Name links in the Project Overview screen then I get almost the same URL but the value for oas is same for all different paProjectId's: 
OA_HTML/OA.jsp?_rc=PA_PROJECT_HOME_LAYOUT&_ri=275&addBreadCrumb=RS&paProjectId=4832&_ti=2094430068&oapc=3&oas=7XDzPk3HK9fR2emiJYeO9Q.. 
OA_HTML/OA.jsp?_rc=PA_PROJECT_HOME_LAYOUT&_ri=275&addBreadCrumb=RS&paProjectId=4869&_ti=2094430068&oapc=3&oas=7XDzPk3HK9fR2emiJYeO9Q.. 
OA_HTML/OA.jsp?_rc=PA_PROJECT_HOME_LAYOUT&_ri=275&addBreadCrumb=RS&paProjectId=4850&_ti=2094430068&oapc=3&oas=7XDzPk3HK9fR2emiJYeO9Q.. 
 
I know the issue lie on oas value but I could NOT get the right value for this parameter in the above URLs. 
 
Has someone some idea how to solve this issue. 
 
Many thanks, 
 
Cafer

Cafer,
If you see old threads i have explained that the three profiles Kali mentioned... is basically to bypass the MAC key validation in Apps.If you don't want to change these profiles, you would need to use bound values api's to attach js function with onclick attribute of button.
If you are new to bound values concept, this is what u need to do:
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pagecontext.putJavaScriptFunction();
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--Mukul

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