[Newbies] PipableOSProcess#notifyError

[Aidan Gauland]

Hi,

Why does the following statement not appear to do anything?  (I
expected an error window to pop up.)

(PipeableOSProcess command: 'false') notifyError.

Stepping through this with the debugger, I found that the
ExternalUnixOSProcess's runState is #unknownRunState instead of
#complete, the value it must be in order for #notifyError to do
anything.

--Aidan