I had some trouble when running a TSelector on a TChain, namely the error
Warning in < *TTreeReader::SetEntryBase* ()>: The *current tree in the TChain* ntp has changed
and a very slow running on any other than the first tree in the chain.
What solved the problem for me (and took me quiet a while) was to replace
in TSelector::Process, which also is recommended in the documentation of TTreeReader. Since the auto-generated code of TTree::MakeSelector generates SetEntry rather SetLocalEntry, I’d suggest to patch TTreeReaderGenerator (where it seems to be implemented) accordingly.
Or is there some other effect I missed by changing SetEntry to SetLocalEntry?
_ROOT Version: 6.06/02
Platform: Linux Debian 8.11
Compiler: Not Provided