I downloaded pd-osc from my package repo, but there is no hint about where udpsend is supposed to come from. There is no pd-mrpeach from my repo either, so I'm currently trying to get the version from
https://svn.code.sf.net/p/pure-data/svn/trunk/externals/mrpeach/net/ working without much success. It compiles but I still get "udpsend ..couldn't create".