[Pki-users] SAN:howt is it possible to sign certificate requests with DNS alias names?

I try to sign certificate requests with SAN extension to have DNS alias names, but with no success. I see that there are subjectAltNameExt in the profile but my policyset.serverCertSet.9.default.params.subjAltExtPattern_0=$request.req_san_pattern_0$ is always null, although I have input.i3.name=subjectAltNameExtInputImpl for the inputs. What I am doing wrong?