I am unable to see wave in Gaw. I am selecting net and Alt + G key then showing this.

@ALOK PRATAP SINGH could you try restarting your PC or killing the background processes?

Yes I did again. But still same

@ALOK PRATAP SINGH try opening the file mentioned and uncomment the line

Also launch gaw from xschem (Waves" button). The ~/.gaw/gawrc should have this line uncommented:

up_listenPort = 2020