Adding new Branch to TTree

From: OKUMURA, Akira <oxon_at_ceres.phys.s.u-tokyo.ac.jp>
Date: Tue, 1 Jul 2008 13:31:45 -0700


Hello ROOTers,

My colleague wrote a PyROOT script which adds a new branches to an existing tree and saves it to new file. I ran this script but I cannot access to the original branches in the resultant file. I wrote an C++ equivalent code and tried it. But I got same error. Where should it be modified?

I also tried TTree::SetEntries(), TTree::SetBranchStatus() and TTree::Fill(). But these did not solve this error.

5.20.00 & 5.18.00 (OS X Leopard Intel 32 bit) 5.20.00 (Fedora Core 8 64 bit)

Float_t a;
TBranch* aBra = tnew->Branch("a", &a, "a/F"); for(int i=0; i<t->GetEntries(); i++){

   t->GetEntry(i);
   // Other calculations here...
   aBra->Fill();
} // i

tnew->Write();
fnew->Close();

(no debugging symbols found)

0x0000003a33e9a835 in waitpid () from /lib64/libc.so.6 Missing separate debuginfos, use: debuginfo-install expat.x86_64 fontconfig.x86_64 freetype.x86_64 gcc.x86_64 giflib.x86_64 glibc.x86_64 libICE.x86_64 libSM.x86_64 libX11.x86_64 libXau.x86_64 libXcursor.x86_64 libXdmcp.x86_64 libXext.x86_64 libXfixes.x86_64 libXft.x86_64 libXpm.x86_64 libXrender.x86_64 libjpeg.x86_64 libpng.x86_64 libtiff.x86_64 libxcb.x86_64 zlib.x86_64 #1 0x0000003a33e3ce39 in do_system () from /lib64/libc.so.6 #2 0x000000000084f4e2 in TUnixSystem::StackTrace ()

    from /usr/local/root_v5.20.00/lib/libCore.so #3 0x000000000084ddaa in TUnixSystem::DispatchSignals ()

    from /usr/local/root_v5.20.00/lib/libCore.so

#4  <signal handler called>
#5  0x0000003a33e7b6af in memcpy () from /lib64/libc.so.6
#6  0x00007fa1d1ed0fcb in TBasket::ReadBasketBuffers ()

    from /usr/local/root_v5.20.00/lib/libTree.so #7 0x00007fa1d1ed8a40 in TBranch::GetBasket ()

    from /usr/local/root_v5.20.00/lib/libTree.so #8 0x00007fa1d1ed9018 in TBranch::GetEntry ()

    from /usr/local/root_v5.20.00/lib/libTree.so #9 0x00007fa1cfdddd1c in TTreeFormula::EvalInstance ()

    from /usr/local/root_v5.20.00/lib/libTreePlayer.so #10 0x00007fa1cfdcdbad in TSelectorDraw::ProcessFill ()

    from /usr/local/root_v5.20.00/lib/libTreePlayer.so #11 0x00007fa1cfded2f8 in TTreePlayer::Process ()

    from /usr/local/root_v5.20.00/lib/libTreePlayer.so #12 0x00007fa1cfdeee09 in TTreePlayer::DrawSelect ()

    from /usr/local/root_v5.20.00/lib/libTreePlayer.so #13 0x00000000009be9e3 in G__G__Base2_10_0_15 ()

    from /usr/local/root_v5.20.00/lib/libCore.so #14 0x0000000000fe58fd in Cint::G__ExceptionWrapper ()

    from /usr/local/root_v5.20.00/lib/libCint.so #15 0x000000000108ffdc in G__execute_call ()

    from /usr/local/root_v5.20.00/lib/libCint.so #16 0x0000000001090d70 in G__call_cppfunc ()

    from /usr/local/root_v5.20.00/lib/libCint.so #17 0x000000000106b036 in G__interpret_func ()

    from /usr/local/root_v5.20.00/lib/libCint.so #18 0x000000000105acb2 in G__getfunction ()

    from /usr/local/root_v5.20.00/lib/libCint.so #19 0x000000000113d939 in G__getstructmem ()

    from /usr/local/root_v5.20.00/lib/libCint.so #20 0x0000000001133df0 in G__getvariable ()

    from /usr/local/root_v5.20.00/lib/libCint.so #21 0x000000000102ebac in G__getitem ()

    from /usr/local/root_v5.20.00/lib/libCint.so #22 0x000000000102eeb9 in G__getitem ()

    from /usr/local/root_v5.20.00/lib/libCint.so #23 0x0000000001035edb in G__getexpr ()

    from /usr/local/root_v5.20.00/lib/libCint.so #24 0x00000000010bb334 in G__exec_statement ()

    from /usr/local/root_v5.20.00/lib/libCint.so #25 0x000000000101c0f6 in G__exec_tempfile_core ()

    from /usr/local/root_v5.20.00/lib/libCint.so #26 0x000000000101c3fe in G__exec_tempfile_fp ()

    from /usr/local/root_v5.20.00/lib/libCint.so #27 0x00000000010c4fe5 in G__process_cmd ()

    from /usr/local/root_v5.20.00/lib/libCint.so #28 0x000000000083f697 in TCint::ProcessLine ()

    from /usr/local/root_v5.20.00/lib/libCore.so #29 0x0000000000788069 in TApplication::ProcessLine ()

    from /usr/local/root_v5.20.00/lib/libCore.so #30 0x0000000000120801 in TRint::HandleTermInput ()

    from /usr/local/root_v5.20.00/lib/libRint.so #31 0x000000000011f1c7 in TTermInputHandler::Notify ()

    from /usr/local/root_v5.20.00/lib/libRint.so #32 0x000000000012110d in TTermInputHandler::ReadNotify ()

    from /usr/local/root_v5.20.00/lib/libRint.so #33 0x000000000084d9e3 in TUnixSystem::CheckDescriptors ()

    from /usr/local/root_v5.20.00/lib/libCore.so #34 0x000000000084e458 in TUnixSystem::DispatchOneEvent ()

    from /usr/local/root_v5.20.00/lib/libCore.so #35 0x00000000007da666 in TSystem::InnerLoop ()

    from /usr/local/root_v5.20.00/lib/libCore.so #36 0x00000000007dda41 in TSystem::Run ()

    from /usr/local/root_v5.20.00/lib/libCore.so #37 0x0000000000786e3f in TApplication::Run ()

    from /usr/local/root_v5.20.00/lib/libCore.so #38 0x0000000000120d00 in TRint::Run ()

    from /usr/local/root_v5.20.00/lib/libRint.so #39 0x000000000040102d in main ()
The program is running. Quit anyway (and detach it)? (y or n) [answered Y; input not from terminal]
Detaching from program: /proc/9045/exe, process 9045 Root >

Regards,

OKUMURA, Akira oxon_at_ceres.phys.s.u-tokyo.ac.jp Department of Physics, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033
TEL/FAX +81 3-5841-4173/4059
Skype : okumura.akira Received on Tue Jul 01 2008 - 22:32:03 CEST

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