Hi Avi,
If libMyclass.so is the shared lib with your classes Neutron, Bunch, etc
you can load this library with
gSystem->Load("libMyclass");
You must load the libs in the right order in case one lib references classes
from another lib.
In case you already have a statement like the one above, you must remove
the statement gROOT->Reset() from your macro or add gSystem->Load("libMyclass")
after gROOT->Reset().
Rene Brun
Avi Malki wrote:
>
> hi Rene,
>
> > As indicated by the error messages, your library with the classes Neutron,
> > Tracks and Bunch is missing. Did you forget to load it ?
>
> I don't forget to load the classes Neutron, Tracks and Bunch. I don't
> know how to do this. Can you please explain how to do this?
> My root version is 2.22/09.
>
> Best Regards
> Avi.
>
> >
> > With the new branch style introduced in 3.01, one should be able to copy/select
> > a Tree without having the original classes.
> >
> > Rene Brun
> >
> >
> > Avi Malki wrote:
> > >
> > >hi rooters,
> > >
> > >We would like to consider reducing the data and select events with some
> > >criteria such as 3 tracks (in event branch) and one negative particle (in
> > >tracks branch) for example.
> > >
> > >The program below create a new tree with number of tracks equal 3
> > >for example. The problem is that only 'event' is created the other
> > >Branches (they are under event branch): Neutron, Tracks and Bunch
> > >are filled with zeros for all variables.
> > >
> > >Can someone please give us advise how to overcome this problem?
> > >
> > > Best regards
> > > avi.
> > >
> > >{
> > > gROOT->Reset();
> > >
> > > gSystem->Load("/usr/local/root/test/libEvent.so");
> > >
> > > TFile f("../DATA/tf8826.root");
> > > TTree *T = (TTree*)f.Get("T");
> > >
> > > Event *event = new Event();
> > >
> > > T->SetBranchAddress("event",&event);
> > >
> > > TFile f2("New.root","recreate");
> > > TTree *T2 = T->CopyTree("Ntrack==3");
> > >
> > > T2->Write();
> > >}
> > >
> > >The problem:
> > >
> > >root [0]
> > >Processing tree_copy.c...
> > >Warning in <TBranchClones::Streamer>: Unknow class: Neutron. Cannot read BranchClones: fNeut
> > >Warning in <TBranchClones::Streamer>: Unknow class: Bunch. Cannot read BranchClones: fBn
> > >Warning in <TBranchClones::Streamer>: Unknow class: Neutron. Cannot read BranchClones: fNeut
> > >Warning in <TBranchClones::Streamer>: Unknow class: Bunch. Cannot read BranchClones: fBn
> > >root [1] .q
> >
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