runtime error when using orb slam v2

[jhz-linhe]

Firstly, thanks for sharing. I am trying orb slam v2, encountering below error when launching.
Parallels ubuntu 14.04 virtual machine on Mac, 8G Memory, 4 Cores.

terminate called after throwing an instance of 'std::runtime_error'
what(): Pangolin X11: Unable to retrieve framebuffer options
Aborted (core dumped)

Thank you all in advance for any help!

[liumengbjut]

Still happen.