Error Pipe is broken

I am using a procedure which is checking the controls of an dynamic loades page.
The page is loaded via a menu links with different product parameters.
The link is clicked as an step, then the procedure is called in an following step.

Sometimes I get this error:
------------------------------------------------------------
'22.04.2013 16:45:27' - Error encountered during execution.
------------------------------------------------------------
'22.04.2013 16:45:27' - Error attempting to exit runner. Error: System.IO.IOException: Pipe is broken.
   at System.IO.Pipes.PipeStream.WinIOError(Int32 errorCode)
   at System.IO.Pipes.PipeStream.WriteCore(Byte[] buffer, Int32 offset, Int32 count)
   at System.IO.Pipes.PipeStream.Write(Byte[] buffer, Int32 offset, Int32 count)
   at ArtOfTest.WebAii.Design.Execution.RunnerController.Exit()
------------------------------------------------------------
'22.04.2013 16:45:27' - Aborting....


Hmm, getting more and more frustrated