[SOLVED] init and cleanup methods in simulation tree

Hi,
my questions are about the global init and cleanup methods in the sofa::simulation::tree namespace. I want to be sure to use them correctly.

Reading the code, they change a series of static boolean variables. Are these variables used somewhere else? What is their utility? What’s the behavior if I don’t call those two methods? If I don’t call them I get warnings, but do I risk anything else?

My second topic: if I call cleanup after init, does it mean that the tree is not initialized anymore? I see that cleanup does not turn the init flags. I assume those two methods have to be used only once in the program lifetime, am I right?

Thanks for your help,

Alex