I'm running makemkvcon from the commandline with cache set to 256MB - absolutely no problems.
THIS is exactly the problem when the streaming server could not start with http://#ERRORI was running a DLNA server: Eyeconnect from Elgato.I just stopped the server and Makemkv worked perfectly.
But... is the error "ok" in a way of this is normal or is it an error in makemkv or in eyetv ?
Probably the best solution is to shutdown EyeConnect via applescript, start streaming and after that
autostart EyeConnect again - if you have to use it.