I had to install PiAware and fr24 again. it took some time, Flightradar s running at least, but Piaware unfortunately stays red instead of green. Running PiAwware status gives me an error. Can someone help me to solve thois? pi@raspberrypi : ~ $ sudo piaware-status
PiAware master process (piaware) is running with pid 493.
PiAware ADS-B client (faup1090) is running with pid 1252.
PiAware ADS-B UAT client (faup978) is not running (disabled by configuration settings)
PiAware mlat client (fa-mlat-client) is not running.
Local ADS-B receiver (dump1090-fa) is running with pid 1189.
dump1090-fa (pid 1189) is listening for ES connections on port 30005.
Thanks for all the replies.
Wiederhopf solution link did it. For some reasons I needed several times to correct the problem. But today I was able to solve it. Do thanks again.