do I have to be Admin to create calculated measures in an OLAP report and set the security to public? Or is there a method to give that permission to normal users, too?
Starting with build 189, only Admin or Writer user can save calculations to public.
Starting with new build 190, there will be a new application setting under Admin > Settings > Security > “Everyone can save calculated members to public”.
One workaround is to modify "C:\inetpub\wwwroot\ReportPortal\olap\CalculatedField.aspx", Line 85. Change: <%If Session("IsAdmin") = True OrElse Session("IsWriter") = True Then%>