Error in <RootX11IOErrorHandler>: fatal X11 error (connection to server lost?!) during nohup

[couet]

May be you can find some help with these posts:

Linux command nohup and Root

Hi, it might be that ROOT needs to access a real terminal, and stops execution if the terminal is blocked (which is the case for nohup, if I remember correctly). Did you try screen? Axel.

https://root.cern.ch/root/roottalk/roottalk01/2640.html