There are some bugs in the comps file. It references packages or sections that are not available. I get the following messages on console 3 during a TUI network install: moving (1) to step readcomps Using file:///isomedia/RedHat/base/comps.xml core references package yaboot which doesn't exist core references package efibootmgr which doesn't exist core references package s390utils which doesn't exist core references package ppc64-utils which doesn't exist sql-server references package postgresql-server which doesn't exist base references package iscsi which doesn't exist base references package reiserfs-utils which doesn't exist dialup references package minicom which doesn't exist dialup references package statserial which doesn't exist dialup references package lrzsz which doesn't exist workstation-common references package office which doesn't exist workstation-common references package sound-and-video which doesn't exist workstation-common references package games which doesn't exist workstation-common references package graphics which doesn't exist editors references package emacs which doesn't exist
Some of these are arch-specific, some are intentionally gone. The big one that wasn't (postgresql-server) is already fixed.