Re: Strange TClonesArray problem

Hi,

can you call

gROOT->ProcessLine(".class MyClass")
if (TClass::GetClass("MyClass")) TClass::GetClass("MyClass")->Dump() else printf("No TClass for MyClass!\n");

before writing out the tree? What's the output?

Cheers, Axel.

Filimon Roukoutakis wrote on 01/19/2011 02:22 PM:
> Hi, I get a strange problem related to TClonesArray. When initiliazing
> on a MyEvent class ctor a member fMyArray with new
> TClonesArray("TParticle", 100000), even TClonesArray("TClonesArray",
> 10000000)!) everything works like a charm. But when doing new
> TClonesArray("MyClass", 100000) I get the wonderful output below, when
> eventually trying to write MyEvent in a TTree. MyClass inherits from
> TObject, has ClassDef and an appropriate entry in my linkdef.h #pragma
> link C++ class MyClass+; Is is more simple than a TParticle (5 Int_t, 10
> Double_t, no mult inheritance, no allocation, no pointers, just a POD
> 5*32+10*64+TObject). What could be the problem (ie is there any
> additional requirement for MyClass)? The problem persists even if I use
> the default second argument for TClonesArray (I believe it is 100). Thanks,
> filimon
>
> *** Break *** segmentation violation
> .......
> .......
>
> ===========================================================
> #10 0x00900e94 in TClass::GetStreamerInfo(int) const () from
> /opt/root/v5-28-00/lib/libCore.so.5.28
> #11 0x06e82b03 in TBufferFile::ForceWriteInfoClones(TClonesArray*) ()
> from /opt/root/v5-28-00/lib/libRIO.so
> #12 0x008dbabf in TClonesArray::Streamer(TBuffer&) () from
> /opt/root/v5-28-00/lib/libCore.so.5.28
> #13 0x008feb84 in TClass::StreamerTObjectInitialized(void*, TBuffer&,
> TClass const*) const () from /opt/root/v5-28-00/lib/libCore.so.5.28
> #14 0x06e880b7 in TBufferFile::WriteObjectClass(void const*, TClass
> const*) () from /opt/root/v5-28-00/lib/libRIO.so
> #15 0x06e84eba in TBufferFile::WriteObjectAny(void const*, TClass
> const*) () from /opt/root/v5-28-00/lib/libRIO.so
> #16 0x06e87727 in TBufferFile::WriteFastArray(void**, TClass const*,
> int, bool, TMemberStreamer*) () from /opt/root/v5-28-00/lib/libRIO.so
> #17 0x06f530a3 in int TStreamerInfo::WriteBufferAux<char**>(TBuffer&,
> char** const&, int, int, int, int) () from /opt/root/v5-28-00/lib/libRIO.so
> #18 0x0182b9ce in TBranchElement::FillLeaves(TBuffer&) () from
> /opt/root/v5-28-00/lib/libTree.so
> #19 0x01821720 in TBranch::Fill() () from /opt/root/v5-28-00/lib/libTree.so
> #20 0x01827f10 in TBranchElement::Fill() () from
> /opt/root/v5-28-00/lib/libTree.so
> #21 0x01827ee8 in TBranchElement::Fill() () from
> /opt/root/v5-28-00/lib/libTree.so
> #22 0x01872aff in TTree::Fill() () from /opt/root/v5-28-00/lib/libTree.so
>
Received on Wed Jan 19 2011 - 14:32:44 CET