Error: redefinition of a variable

Newbie
#1

When I try to load the same code a second time in the terminal, it shows the following error.

rf3
rf31269×699 73.3 KB

My understanding is that if you create a variable using “new”, the memory is stored in a heap so you have to use delete command to free the space. However, I have defined the variable normally so it should be stored in stack memory and should be freed after the program ends.

How can I execute my code without getting the following error? Thank you.

Loaded macro not running twice
Run twice a macro with vectors of defined size
#2

Hi,
this was a limitation of the ROOT interpreter until recently (stemming from the fact that C++ does not like redefinition of variables).

In ROOT v6.22 (or maybe already in v6.20) the situation is greatly improved. What ROOT version are you on?

Cheers,
Enrico

#3

My ROOT version is 6.16/00.

#4

Yep,
so that’s it. Please check https://root.cern/install for available ways to upgrade to a more recent ROOT version.

Cheers,
Enrico