. logging to /home/pp/.ros/log/a0b54000-a1ac-11e7-88cc-303a64604320/roslaunch-dell-3511.log
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.
Unable to contact my own server at [http://IP_OF_PC:42017/
This usually means that the network is not configured properly.
A common cause is that the machine cannot ping itself. Please check
for errors by running:
For more tips, please see
The traceback for the exception was written to the log file