Thanks David! The warnings/errors still show up in systemd's log when the system boots. However I expect 12.3 will be out of support soon and I expect to upgrade to 13.2 by the end of the year. It's probably better to put the effort into 13.2 and I'll investigate the problem then. If the change to hylafax+ has happened by 13.2 I'll need to look into things anyway.