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Validation of viewstate MAC failed

Shiva A

i used this line in web config for this error

"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. "

But Again same error is repeating after 2 days.

Any one give suggestion

1 Reply

Know the answer? Post it — somebody with the same question will find it here.

Rajeesh Menoth10y ago
Hi,

Please check the following reference :

http://stackoverflow.com/questions/5647525/validation-of-viewstate-mac-failed

http://stackoverflow.com/questions/19355196/viewstate-exception-validation-of-viewstate-mac-failed

https://rajeeshmenoth.wordpress.com/2014/05/20/validation-of-viewstate-mac-failed-in-asp-net/