Cannot see Minimserver anymore for UPNP/DLNA

[streamer99]

After quite a lot of work, my minimsever log file is now free of errors. There are still lots of warnings but I have not understood from the previous correspondence that warnings were a problem.
Nevertheless, having done this, I find that using MConnect on iphone, the Synology audio server is seen within about 10 seconds but MinimServer is taking >7 minutes to appear unless rescanning is done in which case it appears after maybe 20s but this is then required repeatedly after playing music.