Problem wbdiff SNF 2012-10-23 18:19:38: one cassette is missing

popomoo at popomoo at
Fri Jan 11 13:16:55 PST 2013

There are five wafer boxes in wbdiff.
However, one box does not have a cassette inside. 
I checked the wet bench thoroughly, but I could not find it around.
It seems to me that someone took it out without putting it inside the box. I was concerned about the contamination issue.

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