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HomeHomeUsing DNN Platf...Using DNN Platf...Administration ...Administration ...Validation of viewstate MAC failed.Validation of viewstate MAC failed.
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8/1/2017 9:59 AM
 
Hello,
Please help. After upgrading to DNN ver. 9.1.1 I started getting this Page Load Exception:

InnerMessage: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. See http://go.microsoft.com/fwlink/?LinkID=314055 for more information.

InnerStackTrace:
at System.Web.UI.ViewStateException.ThrowError(Exception inner, String persistedState, String errorPageMessage, Boolean macValidati ) at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString, Purpose purpose) at System.Web.UI.Util.DeserializeWithAssert(IStateFormatter2 formatter, String serializedState, Purpose purpose) at System.Web.UI.HiddenFieldPageStatePersister.Load() at System.Web.UI.Page.LoadPageStateFromPersistenceMedium() at System.Web.UI.Page.LoadAllState() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
______________________

I have searched the Internet but could find the remedy.

Thanks,
Vladimir
 
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8/1/2017 11:07 AM
 
please clear local browser cache and retry.

Cheers from Germany,
Sebastian Leupold (Microsoft MVP)

dnnWerk - The DotNetNuke Experts   German Spoken DotNetNuke User Group

Speed up your DNN Websites with TurboDNN
 
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8/1/2017 1:31 PM
 
Thank you, Sebastian.
Still the question remains. At what point (i.e. when and why) the page load exception is generated? Should I check the site settings and do something or is it a minor error that I can ignore?
 
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8/1/2017 3:11 PM
 
this error is usually only shown on postbacks, when the page tries to retrieve the control values and notices the control list has been modified.

Cheers from Germany,
Sebastian Leupold (Microsoft MVP)

dnnWerk - The DotNetNuke Experts   German Spoken DotNetNuke User Group

Speed up your DNN Websites with TurboDNN
 
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8/1/2017 6:44 PM
 
Thank you Sebastian. Now it's clear. The error was thrown while I was updating the contents of my site.

Vladimir
 
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