Errors in cleaving fcc metals with Material Studio 6.1

Hi All,

When I try to cleave Cu metal in (111) - direction with four layer it gives five layer. I tried with other metals, cleaving in material studio always gives one more extra layer.

I can always delete the extra layer, but this is very annoying.This was ok, when I use the older version of Material Studio, this happens only with Material Studio 6.1.

I wonder if anyone has this problem with MS 6.1?

Thanks.

YM