can't expand a file

i tried to expand a file... but got an error message.

what's wrong with it?
Hiroyuki TamuraField EngineerAsked:
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slyongConnect With a Mentor Commented:
sorry.. hitting submit too fast.. and try to download the latest StuffIt from
What's your OS version?
walsellersConnect With a Mentor Commented:
The StuffIt-X archive (.sitx) is a newer version of the Stuffit file (.sit)
Hiroyuki TamuraField EngineerAuthor Commented:
thank you, all:)
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