Try to evaluate ScriptLoader new cleanUpMethods

and you will see that in ScriptLoader >> cleanUpMethods�

you do:

Delay startTimerInterruptWatcher.

and there is the DNU as startTimerInterruptWatcher� is never implemented.

Solutions ?

1) Remove Delay startTimerInterruptWatcher.� from cleanUpMethods

2) Maybe the message should be stopTimerEventLoop ??� I have no idea

The only thing I found in the issues was this:

http://code.google.com/p/pharo/issues/detail?id=1424

In squeak 3.9� the method is implemented, and like this:

startTimerInterruptWatcher
�� "Reset the class variables that keep track of active Delays and re-start the timer interrupt watcher process. Any currently scheduled delays are forgotten."
�� "Delay startTimerInterruptWatcher"

�� | p |
�� self primSignal: nil atMilliseconds: 0.
�� TimingSemaphore == nil
�� ifFalse: [TimingSemaphore terminateProcess].
�� TimingSemaphore _ Semaphore new.
�� AccessProtect _ Semaphore forMutualExclusion.
�� SuspendedDelays _
�� SortedCollection sortBlock:
�� [:d1 :d2 | d1 resumptionTime <= d2 resumptionTime].
�� ActiveDelay _ nil.
�� p _ [self timerInterruptWatcher] newProcess.
�� p priority: Processor timingPriority.
�� p resume.