(no subject)

From: Dmitry Naumov <naumov_at_nusun.jinr.ru>
Date: Tue, 26 Apr 2005 19:51:31 +0200

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 Received on Tue Apr 26 2005 - 17:59:56 MEST