Hi, 

We are trying to use your java sdk on linux (without X11) with your demo project.
On windows, it works but on linux, we have this error : 
"No X11 DISPLAY variable was set, but this program performed an operation which requires it."

We found this in your documentation : "Note: The demo version doesn’t work in headless mode like Linux with no X-Window installed. Contact us if you need a headless version!"
So is it possible to have a a headless version? 

Thank you in advance for your answer. 
François (Java Dev)