octave has problem with xlib

[Mauricio Fabian Duque Daza]

Hi,

I installed octave 4.2 via Slackbuilds, but when I type

octave:1> load profile.dat
octave:2> plot(profile)

I get this message

Xlib:  extension "GLX" missing on display ":0.0".
Xlib:  extension "GLX" missing on display ":0.0".
Insufficient GL support
Xlib:  extension "GLX" missing on display ":0.0".
Xlib:  extension "GLX" missing on display ":0.0".
error: unable to plot due to insufficient OpenGL support

I did not have problem with the installation process

Someone can help me.

thanks

Mauricio