Common problems and their solutions

If something does not work as expected, please take a look at the terminal output of OpenWebRX carefully. Sometimes it is not obvious what is causing the problem, as by running OpenWebRX a lot of external processes a spawned, which interact with the server process. Sometimes you will get the error message from one of these processes.

csdr: function name given in argument 1 does not exist.

You will usually receive this error message if you pulled the latest OpenWebRX from git, but you did not upgrade csdr as well, and the old version of csdr is not compatible anymore.

The solution is to upgrade csdr.

socket.error: [Errno 98] Address already in use

You should try to do this before restarting OpenWebRX:

sudo killall csdr

I'm getting a totally black waterfall diagram

Xou have ncat on your system, and on some reason your RTL-SDR or other I/Q input source failed and the corresponding process exited. You will see something like:

No supported devices found.

Please check manually that your start_rtl_command works, e.g. try:

rtl_sdr - > /dev/null

usb_claim_interface error -6, Failed to open rtlsdr device #0.

You should either blacklist the dvb_usb_rtl28xxu kernel module, or solve it quickly (will have to repeat it on every reboot):

sudo rmmod dvb_usb_rtl28xxu

My receiver is not getting listed on sdr.hu

You should check that your receiver can be reached from the public Internet.

You can do this by reading your status page via a web proxy:

http://my_server_address:8073/status

You should also check that the IP or DNS address you have given in server_hostname parameter in config_webrx.py corresponds to your address on the public Internet, not your LAN.