GMT Warning: Character encoding error

Hi,

I am a beginner in Linux and GMT. I am learning GMT from the GMT tutorial
document available along with the GMT software. I am trying to generate a
map using pscoast command, but I get the following error

santosh <at> santosh-laptop:~/tutorial$ pscoast -R-90/-70/0/20 -JM6i -B5g5 -P
-Gchocolate > map3.ps
GMT Warning: Selected character encoding does not have suitable degree
symbol - will use space instead
GMT Warning: Selected character encoding does not have minute symbol (single
quote) - will use space instead
GMT Warning: Selected character encoding does not have second symbol (double
quote) - will use space instead
Segmentation fault

It creates a ps document, but it doesn't open. Can anyone suggest me how to
fix this problem?
I would appreciate any help.

Thanks,
Santosh

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