Validation of veiwstate MAC failed

[Rahul]

Hi,

We have upgraded our application from asp1.1 to ASP 2.0. We get the
"Validation of veiwstate MAC failed" error when we submit the form again
after waiting for 10 to 20 mins. This looks to be a timing issue but how do
I fix it?

ERROR:
"Validation of viewstate MAC failed. If this application is hosted by a Web
Farm or cluster, ensure that <machineKeyconfiguration specifies the same
validationKey and validation algorithm. AutoGenerate cannot be used in a
cluster."

I have tried all I could think of but could not get it to work. Please can
some one provide me a fix for this.

Thanks
Rahul

[Juan T. Llibre]

Check the workarounds of this bug report here :
http://connect.microsoft.com/VisualS...dbackID=101988


Juan T. Llibre, asp.net MVP
asp.net faq : http://asp.net.do/faq/
foros de asp.net, en español : http://asp.net.do/foros/
===================================
"Rahul" <re************@hotmail.comwrote in message news:eL**************@TK2MSFTNGP02.phx.gbl...

Hi,

We have upgraded our application from asp1.1 to ASP 2.0. We get the "Validation of veiwstate MAC
failed" error when we submit the form again after waiting for 10 to 20 mins. This looks to be a
timing issue but how do I fix it?

ERROR:
"Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster,
ensure that <machineKeyconfiguration specifies the same validationKey and validation algorithm.
AutoGenerate cannot be used in a cluster."

I have tried all I could think of but could not get it to work. Please can some one provide me a
fix for this.

Thanks
Rahul

[Rahul]

Hi Juan,

I have tried the different options and it does not help. I have even put the
following in the web.config and still have the issue.

<pages validateRequest="false" enableEventValidation="false"
viewStateEncryptionMode ="Never" />

I am not sure what else to do. I have just one form element on the page.

Also it does not happen because someone submitted the page too soon but
rather beacuse someone waited too long before the submitted the page.

Thanks
Rahul
"Juan T. Llibre" <no***********@nowhere.comwrote in message
news:%2***************@TK2MSFTNGP03.phx.gbl...

Check the workarounds of this bug report here :
http://connect.microsoft.com/VisualS...dbackID=101988


Juan T. Llibre, asp.net MVP
asp.net faq : http://asp.net.do/faq/
foros de asp.net, en español : http://asp.net.do/foros/
===================================
"Rahul" <re************@hotmail.comwrote in message
news:eL**************@TK2MSFTNGP02.phx.gbl...

>Hi,

We have upgraded our application from asp1.1 to ASP 2.0. We get the
"Validation of veiwstate MAC failed" error when we submit the form again
after waiting for 10 to 20 mins. This looks to be a timing issue but how
do I fix it?

ERROR:
"Validation of viewstate MAC failed. If this application is hosted by a
Web Farm or cluster, ensure that <machineKeyconfiguration specifies the
same validationKey and validation algorithm. AutoGenerate cannot be used
in a cluster."

I have tried all I could think of but could not get it to work. Please
can some one provide me a fix for this.

Thanks
Rahul