(loInd:15): Gtk-WARNING **: 00:29:15.926: cannot open display: ?

[K-M-Ibrahim-Khalilullah]

I built openDTAM successfully with a docker file. but I run it using the command:
./a.out ../Trajectory_30_seconds
it produced the following warning and exit:
(loInd:15): Gtk-WARNING **: 00:29:15.926: cannot open display:

Is there any suggestion please?

[anuranbaka]

I'm not sure. My guess would be that the hardware abstraction on docker isn't quite right. I'd try checking that NVidia drivers are correctly working through the docker container, which IIRC is a bit hard to set up. Or try it on a real install of ubuntu