[Twisted-Python] How can LoopCall not be defined?

[Stephan]

I'm running a server with about 20 client connections going to it
right now and monitoring the error log eventually I see LoopCall is
not defined.
how can that be? Thanks in advance.


2011-09-07 22:47:26-0700 [-] Unhandled Error
	Traceback (most recent call last):
	  File "/usr/lib/python2.6/dist-packages/twisted/application/app.py",
line 445, in startReactor
	    self.config, oldstdout, oldstderr, self.profiler, reactor)
	  File "/usr/lib/python2.6/dist-packages/twisted/application/app.py",
line 348, in runReactorWithLogging
	    reactor.run()
	  File "/usr/lib/python2.6/dist-packages/twisted/internet/base.py",
line 1170, in run
	    self.mainLoop()
	  File "/usr/lib/python2.6/dist-packages/twisted/internet/base.py",
line 1179, in mainLoop
	    self.runUntilCurrent()
	--- <exception caught here> ---
	  File "/usr/lib/python2.6/dist-packages/twisted/internet/base.py",
line 778, in runUntilCurrent
	    call.func(*call.args, **call.kw)
	  File "/usr/sbin/firefoxprocess.py", line 48, in onTimer
	    self.firesharkProtocol.handleProcessTimedOut()
	  File "/usr/sbin/fireshark.py", line 32, in handleProcessTimedOut
	    self.dirtyExit();
	  File "/usr/sbin/fireshark.py", line 68, in dirtyExit
	    self.checkIfFirefoxWasKilledLoop = LoopCall(self.checkIfFirefoxWasKilled)
	exceptions.NameError: global name 'LoopCall' is not defined