System.NullReferenceException: Object reference not set to an instance
of an object.
at
System.Web.SessionState.SessionStateModule.PollLockedSessionCallback(Object
state)
at System.Threading._TimerCallback.TimerCallback_Context(Object
state)
at System.Threading.ExecutionContext.runTryCode(Object userData)
at
System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode
code, CleanupCode backoutCode, Object userData)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext
executionContext, ContextCallback callback, Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext
executionContext, ContextCallback callback, Object state)
at System.Threading._TimerCallback.PerformTimerCallback(Object
state)
I have only found reference to this issue in one other location
http://forums.asp.net/t/1132396.aspx I will attempt to un-install the
security patch but that seems like a very poor solution to this
problem.