General submitting shell commands x piping etc... are turned-off in EG. But if system option –ALLOWXCMD is turned on you can do that. Maybe when the hotfix was applied this options was deactivated.
there is a work around using the MODULE function, below is a paper that I wrote that shows how to create directiory by accessing the Windows API directing.
http://analytics.ncsu.edu/sesug/2010/CC06.Putnam.pdf
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