<html><head><style type="text/css"></style></head><body><div style="font-family:arial,helvetica,sans-serif;font-size:12pt">Hi ! <div style="font-family: arial,helvetica,sans-serif; font-size: 12pt;"><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><div style="font-family: arial,helvetica,sans-serif; font-size: 12pt;"><div> have you installed the openGL and others "devel" package before to compile geant4 and gate ? eg for ubuntu : apt-get -y update apt-get -y upgrade apt-get -y --force-yes install build-essential emacs csh g77 apt-get -y --force-yes install lesstif2-dev libxmu-dev apt-get -y --force-yes install libxml2-dev libmysql++-dev libfftw3-dev apt-get -y --force-yes install libtiff-dev libxpm-dev libpng12-dev libpng3 apt-get -y --force-yes install libgl1-mesa-dev libgle3-dev libglew1.5 libglew1.5-dev libglu1-mesa-dev libglut3-dev glutg3-dev </div><div style="font-family: arial,helvetica,sans-serif; font-size: 12pt;"> eg for Fedora : yum -y update yum -y install lesstif lesstif-devel lesstif-mwm libtiff-static tcsh compat-gcc-34-g77 yum -y install libpng10 libpng10-devel libpng-static mysql mysql++ mysql-devel mysql++-devel ... a few weeks ago I've post a complete script/tutorial about how to quickly install open-Gate (with openGL, LMF3, ECAT7 ...) on Fedora 8 / Ubuntu 8.04 LTS. Best Regards and good luck ! Samuel <div style="font-family: arial,helvetica,sans-serif; font-size: 12pt;"><hr size="1">De : Naser Darwish <naser.darwish@gmail.com> À : gate-users@lists.healthgrid.org Envoyé le : Samedi, 4 Avril 2009, 8h42mn 02s Objet : [Gate-users] Cannot get visualization to work with GATE Dear GATE users, I have geant4.9.1.p02 with GATE 4.0 installed and I can get the simulation to work without visualization. However, I would like to be able to use the visualization openGL but I cannot get it to work. What is the mechanism of the steps for visualization prior to and after simulation? I do not know how to get the visualization to work.  I am following the GATE manual in setting up the visualization script and I know that openGL should be installed because when I initialize, I get the following comment: On this machine the G4VIS_USE_OPENGLX=1 This what I type for visualization in the GATE script #VISUALIZATION /vis/open OGLSX /vis/viewer/reset /vis/viewer/set/viewpointThetaPhi 90 90 /vis/viewer/zoom 2 /vis/viewer/set/style surface /vis/drawVolume /tracking/storeTrajectory 1 /vis/scene/endOfEventAction accumulate /vis/viewer/update /vis/verbose 2 /gate/geometry/enableAutoUpdate The error message I get is: ERROR: G4VisManager::IsValidView(): Current view is not valid. ERROR: G4VisManager::PrintInvalidPointers:   Graphics system is OpenGLStoredX but:   Null viewer pointer. Use "/vis/viewer/create". I appreciate the help. Best regards, Naser _______________________________________________ Gate-users mailing list <a rel="nofollow" ymailto="mailto:Gate-users@lists.healthgrid.org" target="_blank" href="mailto:Gate-users@lists.healthgrid.org">Gate-users@lists.healthgrid.org</a> <a rel="nofollow" target="_blank" href="http://lists.healthgrid.org/mailman/listinfo/gate-users">http://lists.healthgrid.org/mailman/listinfo/gate-users</a> </div></div></div> </div></div></div> </body></html>