[SOLVED] UDP input does not work

[kste]

I have a Shipmodul Miniplex 3E in the lan.
If I create a TCP Input On Openplotter (0.15.1) connection, it works, connects and receives NMEA 0183 strings
If I configure the Shipmodul with UDP broadcast and set up in UDP also the connection to Openplotter, it does not work, the diagnostics does not display any input string.
If I create the same connection to Opencpn in the same RPI it works correctly.
Thanks