Hi, dear all Trying to install gate_v5.0.0 with Geant4.9.2.p01 on CentOS 5 The CLHEP(version 2.0.4.2), geant4.9.2.p01, root_v5.24.00 and lmf_v3.0 were installed successfully But when I "make" in the install gate_5.0.0 directory, I got error when linking gate : Linking Gate ... ./tmp/Linux-g++/Gate/libGate.a(GateToRoot.o):(.rodata._ZTV14GateSingleTree[vtable for GateSingleTree]+0x15c): undefined reference to `TTree::CopyAddresses(TTree*)' ./tmp/Linux-g++/Gate/libGate.a(GateToRoot.o):(.rodata._ZTV13GateCoincTree[vtable for GateCoincTree]+0x15c): undefined reference to `TTree::CopyAddresses(TTree*)' ./tmp/Linux-g++/Gate/libGate.a(GateToRoot.o):(.rodata._ZTV11GateHitTree[vtable for GateHitTree]+0x15c): undefined reference to `TTree::CopyAddresses(TTree*)' collect2: ld return 1 make: *** [bin/Linux-g++/Gate] error 1 my environment settings: source env_gate.csh and root.csh Launching Geant4 configuration script /home/cxq/gate5/geant4/geant4.9.2.p01/env.csh On this machine the G4SYSTEM=Linux-g++ On this machine the G4INSTALL=/home/cxq/gate5/geant4/geant4.9.2.p01 On this machine the G4LIB=/home/cxq/gate5/geant4/geant4.9.2.p01/lib On this machine the G4LEVELGAMMADATA=/home/cxq/gate5/geant4/geant4.9.2.p01/data/PhotonEvaporation2.0 On this machine the G4RADIOACTIVEDATA=/home/cxq/gate5/geant4/geant4.9.2.p01/data/RadioactiveDecay3.2 On this machine the G4LEDATA=/home/cxq/gate5/geant4/geant4.9.2.p01/data/G4EMLOW6.2 On this machine the G4NEUTRONHPDATA=/home/cxq/gate5/geant4/geant4.9.2.p01/data/G4NDL3.13 On this machine the G4ABLADATA=/home/cxq/gate5/geant4/geant4.9.2.p01/data/G4ABLA3.0 On this machine the CLHEP_BASE_DIR=/home/cxq/gate5/geant4/CLHEP On this machine the CLHEP_INCLUDE_DIR=/home/cxq/gate5/geant4/CLHEP/include On this machine the CLHEP_LIB_DIR=/home/cxq/gate5/geant4/CLHEP/lib On this machine the CLHEP_LIB=CLHEP On this machine the G4VIS_BUILD_OPENGLX_DRIVER=1 On this machine the G4VIS_BUILD_RAYTRACERX_DRIVER=1 On this machine the G4VIS_USE_OPENGLX=1 On this machine the G4VIS_USE_RAYTRACERX=1 On this machine the XMFLAGS= On this machine the XMLIBS= On this machine the XMFLAGS= On this machine the XMLIBS= On this machine the XAWFLAGS= On this machine the XAWLIBS= On this machine the G4LIB_BUILD_STATIC=1 On this machine the G4LIB_USE_GRANULAR=1 On this machine the G4UI_USE_TCSH=1 In your environment you have the G4WORKDIR=. Configuring GATE options G4WORKDIR set to . G4TMP set to ./tmp G4BIN set to ./bin Data analysis and output features enabled Ascii data output enabled Transport and generation of optical photons is enabled Checking your LD_LIBRARY_PATH variable... ==> OK: /home/cxq/gate5/root/lib is already in your LD_LIBRARY_PATH Use of ROOT enabled ROOT real-time plotter disabled LMF data output disabled ECAT7 data output disabled GATEHOME is set to /home/cxq/gate5/gate_v5.0.0 Checking your path variable... ==> OK: /home/cxq/gate5/gate_v5.0.0/bin/Linux-g++ is already in your path variable G4VERSION9_2 is not set This GATE version only works with Geant4.9.1 Done and my root.csh file is : setenv ROOTSYS setenv LD_LIBRARY_PATH setenv ROOTSYS /home/cxq/gate5/root setenv LD_LIBRARY_PATH ${ROOTSYS}/bin:${LD_LIBRARY_PATH} Can anyone help or know what is happening? Thanks very much ! -- Xiaoqing.Cao School of Mathematics and Statistics, Huazhong Univ. of Sci. & Tech. 1037 Luoyu Road, Wuhan 430074, P. R. China Tel : 13297955461