Hello! I'm not a Linux expert, but I think you lack a package in your Linux... If you have an "add/remove software" somewhere in Ubuntu (maybe under applications?) you can search for the package libXi and install that and I think you'll get rid of the error... Good luck! /Ida <div class="gmail_quote">2009/8/31 Jianfeng He <<a href="mailto:jfenghe@gmail.com">jfenghe@gmail.com</a>> <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Hi Gate-users, I've been installing gate_v5.0.0.p01. CLHEP_2.0.4.2 , Geant4.9.2.p01 and Root_5.24 seem to be successfully installed with gcc4.1.3 under Ubuntu 9.04, but an error occurred at the stage of Linking Gate as below while Gate "make": ... ... ... source/management finished Using granular libraries ... Linking Gate ... /usr/bin/ld: cannot find -lXi collect2: ld returned 1 exit status make: *** [/home/jianfeng/geant4/geant4.9.2.p01/bin/Linux-g++/Gate] Error 1 My "env_gate.sh" was set up as shown in the following: The current value of G4INSTALL is: /home/jianfeng/geant4/geant4.9.2.p01 The current value of G4VERSION is: 9.2 Launching Geant4 configuration script /home/jianfeng/geant4/geant4.9.2.p01/env.sh On this machine the G4SYSTEM=Linux-g++ On this machine the G4INSTALL=/home/jianfeng/geant4/geant4.9.2.p01 On this machine the G4INCLUDE=/home/jianfeng/geant4/geant4.9.2.p01/include/ On this machine the G4LIB=/home/jianfeng/geant4/geant4.9.2.p01/lib On this machine the G4LEVELGAMMADATA=/home/jianfeng/geant4/geant4.9.2.p01/data/PhotonEvaporation2.0 On this machine the G4RADIOACTIVEDATA=/home/jianfeng/geant4/geant4.9.2.p01/data/RadioactiveDecay3.2 On this machine the G4LEDATA=/home/jianfeng/geant4/geant4.9.2.p01/data/G4EMLOW6.2 On this machine the G4NEUTRONHPDATA=/home/jianfeng/geant4/geant4.9.2.p01/data/G4NDL3.13 On this machine the G4ABLADATA=/home/jianfeng/geant4/geant4.9.2.p01/data/G4ABLA3.0 On this machine the CLHEP_BASE_DIR=/home/jianfeng/geant4/CLHEP On this machine the CLHEP_INCLUDE_DIR=/home/jianfeng/geant4/CLHEP/include On this machine the CLHEP_LIB_DIR=/home/jianfeng/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 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 Configuring GATE options G4WORKDIR set to /home/jianfeng/geant4/geant4.9.2.p01 G4TMP set to /home/jianfeng/geant4/geant4.9.2.p01/tmp G4BIN set to /home/jianfeng/geant4/geant4.9.2.p01/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/jianfeng/Gate/root/lib/ is already in your LD_LIBRARY_PATH Use of ROOT enabled ROOT real-time plotter enabled Checking your LD_LIBRARY_PATH variable... ==> OK: /home/jianfeng/Gate/lmf_v2.0/lib is already in your LD_LIBRARY_PATH LMF data output disabled ECAT7 data output disabled GATEHOME is set to /home/jianfeng/Gate/gate_v5.0.0 Checking your path variable... ==> OK: /home/jianfeng/Gate/gate_v5.0.0/bin/Linux-g++ is already in your path variable G4VERSION9_2 is set: GATE is compatible with the geant4 version 9.2 Done ------------- Does anybody have any ideas to solve this error? By the way, how can I get the latest ECAT version? since the websit of <a href="http://opengatecollaboration.healthgrid.org" target="_blank">opengatecollaboration.healthgrid.org</a> for downloading ECAT seems broken. Thanks in advance! Regards, Jianfeng _______________________________________________ Gate-users mailing list <a href="mailto:Gate-users@lists.healthgrid.org">Gate-users@lists.healthgrid.org</a> <a href="http://lists.healthgrid.org/mailman/listinfo/gate-users" target="_blank">http://lists.healthgrid.org/mailman/listinfo/gate-users</a> </blockquote></div>