Hello,

last week we migrated our Kentico CMS site from an old Win2k3 server to a new Win2k8 R2 Webserver (kentico cms 4.1). We did everything as described in the FAQ.

But sometimes when we or customers try to visit the site the get an error. In Eventlog we get the following exception:

Source: Application_Error
EventCode: EXCEPTION
UserID: 65
UserName: public
NodeID: 1
EventDescription: EXCEPTION MESSAGE: The given key was not present in the dictionary.; STACK TRACE: at System.ThrowHelper.ThrowKeyNotFoundException()
at System.Collections.Generic.SortedDictionary`2.get_Item(TKey key)
at CMS.WebAnalytics.AnalyticsHelper.IPHasVisited(String ip, String siteName)
at Global.LogVisitor(SiteNameOnDemand siteName)
at Global.RewriteUrl(String relativePath, ExcludedSystemEnum excludedEnum, ViewModeOnDemand viewMode, SiteNameOnDemand siteName)
at Global.Application_AuthorizeRequest(Object sender, EventArgs e)
at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

does anybody know what the error means? If we reset iis the site work's for eg. 1 hour and than we get the error again?

Thanks for help.

Wbr
Chris