Hi @ccorti ,
thank you for the report and sorry for the high latency, this must have slipped through the cracks.
This is a known annoyance with C++17 builds of ROOT, as that’s the C++ version in which std::data was introduced, and the interpreter has an implicit using namespace std;.
There was some discussion about this at Ambiguous 'data' in global scope .
@Axel did anything change since then?
Cheers,
Enrico