06-06-2012
Just FYI -
This is a known bug in certain versions of IBM Systems Director (aka CAS AGENT). Apparently it gets automatically installed on AIX 6.1 TL7. Here's a link to a blog (not mine) about how they fixed the issue (pretty much the same as suggested by chihung).
edit - I can't post URLs yet, but if you google "CAS AGENT BUG DEV NULL" it should be the first link.
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