RE: [ROOT] TChain and StartViewer

From: LEE, KERRY T. (JSC-SR) (UHCL) (kerry.t.lee1@jsc.nasa.gov)
Date: Tue Apr 08 2003 - 23:55:53 MEST


Philippe,

thanks for the quick reply.

This work around
	f.LoadTree(0);
works if I only have one file in the TChain,

root [0]   gSystem.Load("/home/kerrylee/marie/code/object/data/time.sl");
root [1]   gSystem.Load("/home/kerrylee/marie/code/object/data/data.sl");
root [2] TChain f("DataTree")
root [3] f.Add("/home/kerrylee/marie/data/rootfiles/2003_03.root")
(Int_t)1
root [4] f.LoadTree(0)
(Int_t)0
root [5] f.StartViewer()

 but when I add the second I get a segv.

root [6] f.Add("/home/kerrylee/marie/data/rootfiles/2003_04.root");
root [7] f.StartViewer();
tv__tree = (TTree *) gROOT->FindObject("DataTree");
tv__tree_list->Add(tv__tree);

 *** Break *** segmentation violation
 Generating stack trace...

Before the workaround I got a segv no matter if I had one file or two added
to the TChain.
Is this just because the work around only fixes the TreeViewer for a single
file?  Does the CVS version have the fix for multiple files?

Thanks
Kerry

-----Original Message-----
From: Philippe Canal
To: LEE, KERRY T. (JSC-SR) (UHCL); roottalk@pcroot.cern.ch
Sent: 4/8/2003 3:39 PM
Subject: RE: [ROOT] TChain and StartViewer

Hi Kerry,

Thanks for reporting this problem.  It is fixed in the CVS repository
(and
hence in the next release).

A work around is to call:
	f.LoadTree(0);
after adding the first file but before calling StartViewer.

Cheers,
Philippe.

-----Original Message-----
From: owner-roottalk@pcroot.cern.ch
[mailto:owner-roottalk@pcroot.cern.ch]On Behalf Of LEE, KERRY T.
(JSC-SR) (UHCL)
Sent: Tuesday, April 08, 2003 3:04 PM
To: 'roottalk@pcroot.cern.ch'
Subject: [ROOT] TChain and StartViewer



Hi,

I am using ROOT 3.05.03 on RH7.1 compiled from source.

In this new version I get a segv when I do the following

root [0]
gSystem.Load("/home/kerrylee/marie/code/object/data/time.sl");
root [1]
gSystem.Load("/home/kerrylee/marie/code/object/data/data.sl");
root [2] TChain f("DataTree")
root [3] f.Add("/home/kerrylee/marie/data/rootfiles/2003_03.root")
(Int_t)1
root [4] f.Add("/home/kerrylee/marie/data/rootfiles/2003_04.root")
(Int_t)1
root [5] f.StartViewer()
tv__tree = (TTree *) gROOT->FindObject("DataTree");
tv__tree_list->Add(tv__tree);

 *** Break *** segmentation violation
 Generating stack trace...
 0x401bcbbf in TUnixSystem::StackTrace(void) + 0x25b from
/home/products/root/3.05.03/root/lib/libCore.so
 0x401bb712 in TUnixSystem::DispatchSignals(ESignals) + 0xb2 from
/home/products/root/3.05.03/root/lib/libCore.so
 0x401ba8bb in TWebFile::GetSize(void) const + 0x9b from
/home/products/root/3.05.03/root/lib/libCore.so
 0x401be491 in TUnixSystem::GetSockOpt(int, int, int *) + 0x339 from
/home/products/root/3.05.03/root/lib/libCore.so
 0x40ca0935 in sigaction at
/usr/src/bs/BUILD/glibc-2.2.2/linuxthreads/signals.c:97 from
/lib/i686/libpthread.so.0
 0x40d40648 in killpg at
/usr/src/bs/BUILD/glibc-2.2.2/signal/../sysdeps/posix/killpg.c:34 from
/lib/i686/libc.so.6
 0x41494e13 in TTreePlayer::UpdateFormulaLeaves(void) + 0x1f from
/home/products/root/3.05.03/root/lib/libTreePlayer.so
 0x40b42caa in TChain::LoadTree(int) + 0x89e from
/home/products/root/3.05.03/root/lib/libTree.so
 0x40b4214e in TChain::GetListOfBranches(void) + 0x22 from
/home/products/root/3.05.03/root/lib/libTree.so
 0x414d9b33 in TTreeViewer::MapTree(TTree *, TGListTreeItem *, bool) +
0x2f
from /home/products/root/3.05.03/root/lib/libTreeViewer.so
 0x414d0397 in TTreeViewer::SetTreeName(char const *) + 0x393 from
/home/products/root/3.05.03/root/lib/libTreeViewer.so
 0x414cfe06 in TTreeViewer::TTreeViewer(TTree const *) + 0x18a from
/home/products/root/3.05.03/root/lib/libTreeViewer.so
 0x414e4fde in G__cpp_dllrevG__TreeViewer + 0x3aa from
/home/products/root/3.05.03/root/lib/libTreeViewer.so
 0x405fedff in G__CallFunc::ExecInt(void *) + 0x6f from
/home/products/root/3.05.03/root/lib/libCint.so
 0x40186252 in TMethodCall::Execute(void *, long &) + 0x6a from
/home/products/root/3.05.03/root/lib/libCore.so
 0x40133820 in TPluginHandler::ExecPlugin(int,...) + 0x420 from
/home/products/root/3.05.03/root/lib/libCore.so
 0x414942ef in TTreePlayer::StartViewer(int, int) + 0x8f from
/home/products/root/3.05.03/root/lib/libTreePlayer.so
 0x40b55be7 in TTree::StartViewer(void) + 0x4b from
/home/products/root/3.05.03/root/lib/libTree.so
 0x40b6e6d1 in G__cpp_dllrevG__Tree + 0x7ef5 from
/home/products/root/3.05.03/root/lib/libTree.so
 0x40588351 in G__call_cppfunc + 0x281 from
/home/products/root/3.05.03/root/lib/libCint.so
 0x405778b1 in G__interpret_func + 0x895 from
/home/products/root/3.05.03/root/lib/libCint.so
 0x4055d6c5 in G__getfunction + 0x1449 from
/home/products/root/3.05.03/root/lib/libCint.so
 0x405ec2ab in G__getstructmem + 0x7c3 from
/home/products/root/3.05.03/root/lib/libCint.so
 0x405e5076 in G__getvariable + 0x642 from
/home/products/root/3.05.03/root/lib/libCint.so
 0x40555535 in G__getitem + 0x4dd from
/home/products/root/3.05.03/root/lib/libCint.so
 0x40553ce9 in G__getexpr + 0x8d91 from
/home/products/root/3.05.03/root/lib/libCint.so
 0x4059f56b in G__exec_function + 0x123 from
/home/products/root/3.05.03/root/lib/libCint.so
 0x405a6c54 in G__exec_statement + 0x2efc from
/home/products/root/3.05.03/root/lib/libCint.so
 0x4053b40b in G__exec_tempfile_core + 0x2f3 from
/home/products/root/3.05.03/root/lib/libCint.so
 0x4053b5ba in G__exec_tempfile_fp + 0x22 from
/home/products/root/3.05.03/root/lib/libCint.so
 0x405af52b in G__process_cmd + 0x4f03 from
/home/products/root/3.05.03/root/lib/libCint.so
 0x4017652a in TCint::ProcessLine(char const *, TInterpreter::EErrorCode
*)
+ 0x9a from /home/products/root/3.05.03/root/lib/libCore.so
 0x40108ab7 in TApplication::ProcessLine(char const *, bool, int *) +
0x56b
from /home/products/root/3.05.03/root/lib/libCore.so
 0x40c66467 in TRint::HandleTermInput(void) + 0x127 from
/home/products/root/3.05.03/root/lib/libRint.so
 0x40c65790 in TTermInputHandler::Notify(void) + 0x28 from
/home/products/root/3.05.03/root/lib/libRint.so
 0x40c758a3 in TTermInputHandler::ReadNotify(void) at
/usr/src/bs/BUILD/glibc-2.2.2/stdlib/atexit.c:33 from
/home/products/root/3.05.03/root/lib/libRint.so
 0x401bbb07 in TUnixSystem::CheckDescriptors(void) + 0x113 from
/home/products/root/3.05.03/root/lib/libCore.so
 0x401bb21a in TUnixSystem::DispatchOneEvent(bool) + 0x112 from
/home/products/root/3.05.03/root/lib/libCore.so
 0x4014eaad in TSystem::InnerLoop(void) + 0x1d from
/home/products/root/3.05.03/root/lib/libCore.so
 0x4014ea42 in TSystem::Run(void) + 0x7e from
/home/products/root/3.05.03/root/lib/libCore.so
 0x40109649 in TApplication::Run(bool) + 0x31 from
/home/products/root/3.05.03/root/lib/libCore.so
 0x40c65fa6 in TRint::Run(bool) + 0x2ba from
/home/products/root/3.05.03/root/lib/libRint.so
 0x08048802 in main + 0x52 from
/home/products/root/3.05.03/root/bin/root.exe
 0x40d2f177 in __libc_start_main at
/usr/src/bs/BUILD/glibc-2.2.2/csu/../sysdeps/generic/libc-start.c:129
from
/lib/i686/libc.so.6
 0x080486d1 in _start + 0x21 from
/home/products/root/3.05.03/root/bin/root.exe
Root >

I rebuilt the dictionaries for my class object contained in a
superbranch of
DataTree.  This same script has worked with previous versions.

Thanks
Kerry Lee



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