Re: TChain::GetEntries

Hi Akira,

A priori this is a different problem. Maybe you can send Wim enough information so that he can investigate.

Cheers,
Philippe

OKUMURA, Akira wrote:
> Hello Philippe,
>
> Thank you for your reply. I found a similar (?) problem in PyROOT. Is
> the reason the same? If you add "del chain" at the end of the script,
> this error does not happen.
>
> === tmp.py ===============
> #!/usr/bin/env python
>
> import ROOT
>
> chain = ROOT.TChain("HondaTuple")
> chain.Add("glast*root")
>
> n310 = chain.GetEntries("ptype==310")
>
> # del chain
> ==================
>
> $ ./tmp.py
>
> *** Break *** segmentation violation
> /Users/oxon/49770: No such file or directory.
> Attaching to process 49770.
> Reading symbols for shared libraries . done
> Reading symbols for shared
> libraries ..............................................................................................
> done
> 0x94df6f69 in wait4 ()
>
> ========== STACKS OF ALL THREADS ==========
>
> Thread 1 (process 49770 thread 0x717):
> #0 0x94df6f69 in wait4 ()
> #1 0x94df4abc in system$UNIX2003 ()
> #2 0x010c4d61 in TUnixSystem::StackTrace ()
> #3 0x010c80b5 in TUnixSystem::DispatchSignals ()
> #4 0x010c8228 in SigHandler ()
> #5 <signal handler called>
> #6 0x02960bf2 in TChain::~TChain ()
> #7 0x02999fdd in ROOT::delete_TChain ()
> #8 0x01095b3f in TClass::Destructor ()
> #9 0x0051a9ab in PyROOT::op_dealloc_nofree ()
> #10 0x0051a9d2 in PyROOT::(anonymous namespace)::op_dealloc ()
> #11 0x0015d255 in PyType_GenericNew ()
> #12 0x00146e56 in PyDict_New ()
> #13 0x001473ca in PyDict_SetItem ()
> #14 0x0014a910 in _PyModule_Clear ()
> #15 0x0019d629 in PyImport_Cleanup ()
> #16 0x001a7767 in Py_Finalize ()
> #17 0x001b3d2f in Py_Main ()
> #18 0x00001fca in ?? ()
>
>
> 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
>
> On 2008/09/05, at 11:06, Philippe Canal wrote:
>
>>
>> Hi Akira,
>>
>> I can not quite reproduce the problem, however a related issue
>> (likely to be the cause of your problem) has been fixed in the SVN
>> repository.
>> You can work around the problem by calling chain->SetNotify(0);
>> after the GetEntries:
>>
>> {
>> TChain* chain = new TChain("HondaTuple");
>> chain->Add("080731/glast-08073105590*.root");
>> Int_t n310 = chain->GetEntries("ptype==310");
>> chain->SetNotify(0);
>> chain->Draw("log10(E-mass)>>htemp(100,1,4)", "(ptype==110)*2");
>> }
>>
>> Cheers,
>> Philippe
>>
>>>> OKUMURA, Akira wrote:
>>>>> Hello ROOTers,
>>>>>
>>>>> This short macro crashes with the error message attached at the
>>>>> end of this message.
>>>>>
>>>>> void flux()
>>>>> {
>>>>> TChain* chain = new TChain("HondaTuple");
>>>>> chain->Add("080731/glast-08073105590*.root");
>>>>> Int_t n310 = chain->GetEntries("ptype==310");
>>>>> chain->Draw("log10(E-mass)>>htemp(100,1,4)", "(ptype==110)*2");
>>>>> }
>>>>>
>>>>> If I comment out the line of TChain::GetEntries, it runs as I
>>>>> expected. How can I avoid this problem?
>>>>>
>>>>> I am using
>>>>> ROOT 5.20.00 w/ OS X 10.5.4 (Intel 64 bit)
>>>>> and
>>>>> ROOT 5.20.00 w/ Fedora 8 (64 bit)
>>>>>
>>>>> Please let me know if you need the input ROOT file to investigate
>>>>> the problem, I will upload them at private area.
>>>>>
>>>>> 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 Fri Sep 05 2008 - 12:11:25 CEST