ROOT not working as calculator!

[Wile_E_Coyote]

Missing Canvas

Honestly speaking, sooner or later, you will learn by hard that the policy of using a “system-provided” ROOT version (e.g. in “/usr/[bin|lib]” or “/usr/local/[bin|lib]”) is a dead end. You will learn that you need something like three different versions of ROOT - just because something that works with a particular ROOT version is not working with another ones, or because some piece of your additional, experiment / analysis specific, software explicitly requires a particular ROOT version. The s…