Re: (no subject)

 Hi Dmitry,

 I will need more info to be able to guess what can  get wrong here.
 Does the E01 example without your modifications run ok?  Which versions of geant4_vmc, VGM and Root do you use?

 Ivana

-- 
==============================================================
e-mail:  Ivana.Hrivnacova_at_cern.ch
address: Institut Physique Nucleaire, 91406 Orsay, France
phone:   (33) 01 69 15 65 94
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On Tue, 26 Apr 2005, Dmitry Naumov wrote:



> Dear VMC developers,

> 

> I am just started to play with VMC which looks very nice way to profit from

> ROOT

> and G4, G3.

> 

> I am playing with Ex01 of VMC. I modified two lines of the code in

> void Ex01MCApplication::ConstructGeometry()

> in order to load my detector geometry build with TGeo as follows:

> 

>  if (gMC->IsRootGeometrySupported()) {

>    cout << "Geometry will be defined via TGeo" << endl;

> /*    ConstructMaterials();    ConstructVolumes(); */

>    TGeoManager::Import("nuclon_geometry.root");

>    gMC->SetRootGeometry();

>    }

> 

> 

> The code compliles well, while running run_g4.C I get the following error:

> Geometry will be defined via TGeo

> ### Geometry loaded from file...

> Top volume is TOP. Master volume is TOP

> ### Voxelization retrieved from file

> --- node ID tracking disabled

> ### 2122 nodes/ 2123 volume UID's in nuclon

> ----------------modeler ready----------------

> Converting Root geometry to Geant4 via VGM ...

> #

> 

> <skip>

> 

> ### EM physics for hadrons constructed.

> ### Step limiter physics constructed.

> 

> *** Break *** segmentation violation

> Generating stack trace...

> 0xb3d11e0a in TG4SDConstruction::Construct() + 0x5e from

> /home/naumov/work/geant4/geant4_vmc/lib/tgt_linux/libgeant4vmc.so

> 0xb3d123a4 in TG4SDManager::Initialize() + 0x14 from

> /home/naumov/work/geant4/geant4_vmc/lib/tgt_linux/libgeant4vmc.so

> 0xb3d71e62 in TG4RunManager::Initialize() + 0x42 from

> /home/naumov/work/geant4/geant4_vmc/lib/tgt_linux/libgeant4vmc.so

> 0xb3d760f2 in TGeant4::Init() + 0x22 from

> /home/naumov/work/geant4/geant4_vmc/lib/tgt_linux/libgeant4vmc.so

> 0xb3c84394 in Ex01MCApplication::InitMC(char const*) + 0x8a from

> /home/naumov/work/geant4/geant4_vmc/lib/tgt_linux/libexample01.so

> 0xb3c89101 in <unknown> from

> /home/naumov/work/geant4/geant4_vmc/lib/tgt_linux/libexample01.so

> 

> 

> Could you please give me a hint why it happens?

> 

> Kind regards, Dmitry

> 

>