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POAny ideas of what could cause System.Timers.Timer.set_Enabled property to throw a System.NullReferenceException?
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copied!<p>Here is the stack trace:</p> <blockquote> <p>2012-03-16 19:15:09Z E System.NullReferenceException: Object reference not set to an instance of an object.<br> at System.Timers.Timer.set_Enabled(Boolean value)<br> at System.Timers.Timer.Stop()</p> </blockquote> <p>Here's the code:</p> <p>Timer declared as private member variable.</p> <pre><code>Private _myTimer As System.Timers.Timer </code></pre> <p>Initialize timer method.</p> <pre><code>Private Sub InitializeMyTimer() _myTimer = New System.Timers.Timer _myTimer.Interval = My.Settings.TimeoutSeconds * 1000 _myTimer.Start() AddHandler _myTimer.Elapsed, AddressOf MyTimer_Elapsed End Sub </code></pre> <p>Timer elapsed method. WsMethodAsync calls an .asmx web service method. </p> <pre><code>Private Sub MyTimer_Elapsed(ByVal sender As Object, ByVal e As System.Timers.ElapsedEventArgs) Try _myTimer.Stop() Using thisWSHelper As New WSHelper thisWsHelp.WsMethodAsync() End Using _myTimer.Start() Catch ex As Exception LogAndShowException(ex) End Try End Sub </code></pre> <p>The timer has to have a value or else the Timer.Stop() call would be throwing the exception. This is a sporadic error and I'm just trying to see if anyone has experienced this before or if anyone has any ideas of what could be causing it. It is occuring in a WinForms application in the event handler for the Elapsed event of the Timer, but it is only occuring sporadically on the users computer. I haven't been able to reproduce the error myself.</p>

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