Hi Rene,
I checked the version of my root installation and tried again with the
CVS version from 01 May. But unfortunately the problems I had with
disabled branches did not vanish.
Best regards,
Jan Erik.
On Tue, 30 Apr 2002, Rene Brun wrote:
> Hi Jan Erik,
>
> Are you really using the version from CVS ?
>
> On April 21st I fixed a problem in TChain::SetBranchStatus
> appearing when
> -all branches were disabled
> -then some branches activated but not the top level branch.
> (seems to be your case)
>
> Could you check and let me know?
>
> Rene Brun
>
> Jan Erik Sundermann wrote:
> >
> > Hello rooters,
> >
> > the advised recipe in TChain->MakeClass() to disable braches for reading
> > always fails in my code. I was trying both
> >
> > fChain->SetBranchStatus("*", 0);
> > fChain->SetBranchStatus("event", 1);
> > fChain->SetBranchStatus("platform", 1);
> > (...)
> >
> > and alternatively
> >
> > b_event->GetEntry(entry);
> > b_platform->GetEntry(entry);
> > (...)
> > In the first case all enabled branches allways return 0. In the second
> > case everythings works fine until the loop reaches entry 1353 (maybe the
> > begin of a new file in the chain). Then the entries remain constant.
> > I use the by TChain::MakeClass() generated code skeleton and the current
> > version from CVS. Attached below are the important parts of the code i
> > use.
> >
> > What am i doing wrong?
> >
> > Bye,
> >
> > Jan Erik.
> >
> > --------------------------------------------
> >
> > void
> > brecontp_doubleevents::Loop() {
> >
> > fChain->SetBranchStatus("*", 0);
> > fChain->SetBranchStatus("platform", 1);
> > fChain->SetBranchStatus("partition", 1);
> > fChain->SetBranchStatus("upperID", 1);
> > fChain->SetBranchStatus("lowerID", 1);
> > fChain->SetBranchStatus("runNumber", 1);
> > fChain->SetBranchStatus("nB0", 1);
> > fChain->SetBranchStatus("nChB", 1);
> >
> > if (fChain == 0) return;
> > Int_t nentries = Int_t(fChain->GetEntriesFast());
> >
> >
> > for (Int_t entry1=0; entry1 < nentries; entry1++) {
> >
> > Int_t ientry = LoadTree(entry1);
> > if (ientry < 0) break;
> >
> > fChain->GetEntry(entry1);
> >
> > // or alternatively ...
> >
> > // b_event->GetEntry(entry1);
> > // b_platform->GetEntry(entry1);
> > // b_partition->GetEntry(entry1);
> > // b_upperID->GetEntry(entry1);
> > // b_lowerID->GetEntry(entry1);
> > // b_runNumber->GetEntry(entry1);
> > // b_nB0->GetEntry(entry1);
> > // b_nChB->GetEntry(entry1);
> >
> > long platform1 = platform;
> > long partition1 = partition;
> > long upperID1 = upperID;
> > long lowerID1 = lowerID;
> > long event1 = event;
> > long runnumber1 = runNumber;
> > long nB01 = nB0;
> > long nChB1 = nChB;
> >
> > for (Int_t entry2 = entry1+1; entry2 < nentries; entry2++) {
> >
> > Int_t jentry = LoadTree(entry2);
> > if (jentry < 0) break;
> > fChain->GetEntry(entry2);
> >
> > // or alternatively ...
> >
> > // b_event->GetEntry(entry2);
> > // b_platform->GetEntry(entry2);
> > // b_partition->GetEntry(entry2);
> > // b_upperID->GetEntry(entry2);
> > // b_lowerID->GetEntry(entry2);
> > // b_runNumber->GetEntry(entry2);
> > // b_nB0->GetEntry(entry2);
> > // b_nChB->GetEntry(entry2);
> >
> > }
> > }
> >
> > fChain->SetBranchStatus("*", 1);
> >
> > }
>
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