Invalid viewstate error using dynamic controls asp.net c#

In asp.net web application, we are using dynamic controls in asp Table and other static controls.while navigating between forms or postabcks, We

are facing an intermittent issue "Invalid Viewstate".

Error Message:Invalid viewstate.

Client IP: 27.251.48.180

Port: 8968

Referer: http://50.193.80.10/wfmtest/DailyErection.aspx

Path: /wfmtest/DailyErection.aspx

User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:39.0) Gecko/20100101 Firefox/39.0

ViewState:

/wEPDwULLTEwOTMwMDU5MDYPZBYCZg9kFgICAw9kFgQCAw8PFgIeBFRleHQFEkJhcmNsYXkgRGF2aWQgVHJveWRkAhEPZBYCAgMPZBYCZg9kFhICAQ8PFgIfAAUKMDctMjgtMjAxNWRkAg0PE

A8WBh4NRGF0YVRleHRGaWVsZAUHSm9iRGVzYx4ORGF0YVZhbHVlRmllbGQFA0pvYh4LXyFEYXRhQm91bmRnFgIeCG9uY2hhbmdlBQ9TaG93UHJvZ3Jlc3MoKTsQFbMBAA8wMS0wMDAgLSBvZm

ZpY2UnMTItMTY1IC0gTm9ydGggJiBQdWxhc2tpIFNlbmlvciBIb3VzaW5nITEyLTE4NCAtIFNhbmdhbW9uIFRlcnJhY2UgU3IgQXB0cx8xMy0xMjggLSBWZXRlcmFucyBOZXcgQmVnaW5uaW5

nFDEzLTEzNyAtIFBpbm5hY2xlIDE2HTEzLTE0MyAtIFRhcGVzdHJ5IEdsZW52aWV3IFBEJjEzLTE2MCAtIEFsZGkgLSBPYWsgQ3JlZWsgV0kgRXhwYW5zaW9uJTEzLTE2MSAtIFVuaXYgb2Yg

Q2hpY2FnbyAtIFNydmNzIEJsZGcaMTMtMTY5IC0gQ2xvdmVyaGlsbCBCYWtlcnkaMTMtMTcwIC0gSGFycGVyIENvbGxlZ2UgUEQmMTMtMTcxIC0gTEEgRml0bmVzcy81NTAxICYgNTYwMCBLZ

WR6aWUdMTMtMTcyIC0gU2FnZSBZTUNBIC0gQmxkZyBBZGQnMTMtMTc0IC0gVG95b3RhI...

Source:

StackTrace:

From the forums, we found few solutions which we changed in web.config file as shown below,

viewStateEncryptionMode="Never" />

validationKey='C912F05687CC92785747C70F9241272CE8014BD69F5A3BE7A3A333C4F50FBC83A0398590CC0693AC9D8BEDDEB1EC118A58F8C1FFE090B0D89A020DC75EB9B05E'

decryptionKey='14EFA8EA4BBC435752DE13AB1995AF4A95795F0ECEEFB808' validation='SHA1'/>

Even after this change, we are still finding "Invalid Viewstate" error.

This is of high importance and please anyone help in resolving this issue.

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