Currently, am following up a tutorial on youtube done by pwessel et al. and I got to a point where he plotted 3 map of world using the following scripts;
gmt subplot begin 3x1 -Ff16c/25c -M0 -A
gmt coast -Rg -JH0 -Gpurple -Bg
gmt coast -Rg -JR0 -Ggreen -Bg -c
gmt coast -Rg -JK0 -Gorange -Bg -c
gmt subplot end
gmt end show
and it plotted 3 world maps with different colours for him but in my case, it says permission denied when I tried running same script. So can some please, assist me on what am doing wrong??