you need to add this to your environment file (assuming you're using tcsh). setenv LD_LIBRARY_PATH $LD_LIBRARY_PATH:{wherever CLHEP is}/lib if you're using bash, try export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:{wherever CLHEP is}/lib that should fix up the problem. cheers lucky <div>On 12/05/07, <a href="mailto:danieljw@phas.ubc.ca">danieljw@phas.ubc.ca</a> <<a href="mailto:danieljw@phas.ubc.ca"> danieljw@phas.ubc.ca</a>> wrote:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hi, I have compiled GATE (and all associated software, see below for versions). I navigated to /home.mirg/danieljw/GATE/gate_v3.1.1/bin/Linux-g++ and ran Gate: bin/Linux-g++> ./Gate ./Gate: error while loading shared libraries: <a href="http://libCLHEP-2.0.2.3.so">libCLHEP-2.0.2.3.so </a>: cannot open shared object file: No such file or directory The problem is that I have installed the CLHEP libraries. I went into that directory and explicitly found that file: danieljw@zulu:~/CLHEP/lib> pwd /home.mirg/danieljw/CLHEP/lib danieljw@zulu:~/CLHEP/lib> ls | grep <a href="http://libCLHEP-2.0.2.3.so">libCLHEP-2.0.2.3.so</a> <a href="http://libCLHEP-2.0.2.3.so">libCLHEP-2.0.2.3.so</a> I know that Geant4 used CLHEP fine. I do not know how to tell GATE where to find this file. Does anyone have any suggestions? I posted some specs below. Thanks, Daniel PS. Thank you to Peter, your suggestion fixed the problem. OS: SuSe 9.2 CPU: AMD Athlon 64 3500+ ROOT: 5.12 GEANT4: 8.1.p02 CLHEP: <a href="http://2.0.2.3">2.0.2.3</a> _______________________________________________ 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">http://lists.healthgrid.org/mailman/listinfo/gate-users</a> </blockquote></div>