If only it was that simple
BTW, Debian and Gentoo a nothing like each other, but thanks

The error is given after I run "./buildZCS.sh -t" quite a while into the build process.
I think i may of found the issue, testing now.
It looks like Gentoo can not make a gziped tarball of :-
/home/public/p4/GNR-606/ThirdParty/openldap/openldap-2.4.21.7z/
So I've manually created it and I'll see what happens..