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[JamyTseng <question234083@xxxxxxxxxxxxxxxxxxxxx>]

New question #234083 on Sikuli:
https://answers.launchpad.net/sikuli/+question/234083

Hi,
My environment is 
windows xp + JRE 6 update 45
I had test the code in official document
def changed(event):
        print "something changed in ", event.region
        for ch in event.changes:
                ch.highlight() # highlight all changes
        sleep(1)
        for ch in event.changes:
                ch.highlight() # turn off the highlights
with selectRegion("select a region to observe") as r:
    # any change in r larger than 50 pixels would trigger the changed function
    onChange(50, changed)
    observe(background=True)

wait(30) # another way to observe for 30 seconds
r.stopObserver()

when I use old version of sikuli (1.0RC3)
everything work fine,

but when I use version 1.0.1
will always get error message
[error] script [ sikulitest ] stopped with error in line 11   <--observe(background=True)
[error] java.lang.NullPointerException ( java.lang.NullPointerException )

I also tried on windows 7 64 bit + JRE7
have the same error,

is it a bug in version 1.0.1

or observe will be use in different way in  new version?

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