Hi,

I just need to know the reason for this exception, I was just looking at the event viewer where I found this and looked in some forums, but really I couldnt understand what it meant.

http://www.dotnetnuke.com/Community/Forums/tabid/795/forumid/-1/threadid/174421/threadpage/0/scope/posts/Default.aspx

http://forums.asp.net/p/955145/1173230.aspx#1173230

I need some help in understanding the exception better.

Thank You,

Ro

AssemblyVersion: 04.05.00
PortalID: 0
PortalName: My website

UserID: -1
UserName:
ActiveTabID: 36
ActiveTabName: Home
RawURL: /Default.aspx
AbsoluteURL: /Default.aspx
AbsoluteURLReferrer: http://mywebsite.edu/
UserAgent: Opera/9.0 (Windows NT 5.1; U; en)
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: 74a8bc94-d011-466d-9583-3c2baeba2752
InnerException: 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.
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: System.Web.Configuration.MachineKeySection.GetDecodedData
StackTrace:
Message: DotNetNuke.Services.Exceptions.PageLoadException: 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. ---> System.Web.HttpException: 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. ---> System.Web.UI.ViewStateException: Invalid viewstate. Client IP: 80.97.12.51 Port: 49187 User-Agent: Opera/9.0 (Windows NT 5.1; U; en) ViewState: 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... ---> System.Web.HttpException: Unable to validate data. at System.Web.Configuration.MachineKeySection.GetDecodedData(Byte[] buf, Byte[] modifier, Int32 start, Int32 length, Int32& dataLength) at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString) --- End of inner exception stack trace --- --- End of inner exception stack trace --- at System.Web.UI.ViewStateException.ThrowError(Exception inner, String persistedState, String errorPageMessage, Boolean macValidationError) at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString) at System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter.Deserialize(String serializedState) at System.Web.UI.Util.DeserializeWithAssert(IStateFormatter formatter, String serializedState) 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) --- End of inner exception stack trace ---
Source:
Server Name: ***-WEB

I cant beleive this, I upgraded it myself to DotNetNuke 4.5.5, I even saw it in the host settings then, now I am really confused, why did my websiter roll back to DNN 4.5.0, I am sure I have it to 4.5.5, my first upgrade was from 3.4 to 4.4.1, from 4.4.1 I have upgraded it to 4.5.5.

About my Page Load Exception error, I haven't enabled caching and whilte filter, and Sir I didnt understand when you asked me about enabling, should I enable it or keep it as it is, i.e in diable mode.

To test that I have enable white space filter and caching with server

Thank You,

Ro