Hi,<br><br>The variable G4VERSION is just the number of the Geant4 version you 've installed.<br>So if you have :<br><br>--> Geant4.8.0  --> export or setenv G4VERSION=8.0<br>--> Geant4.8.1 or Geant4.8.2  -->  export or setenv G4VERSION= 8.1<br><br>You also have to fix the GATEHOME variable at the path of your Gate sources directory, if you did not before.<br><br>I personnaly recommend you to install Geant4.8.1.p02 and Gate3.1.1.<br>I hope for you that your CLHEP version if <a href="http://1.9.2.3">1.9.2.3</a> or <a href="http://2.0.2.2">2.0.2.2</a> or <a href="http://2.0.2.3">2.0.2.3</a> (choose this of your choice), others will give you wrong results.<br>Then I think you must install ROOT (developed by the CERN) to get your results, it's the most popular output format used with Gate. Except if you want to use the ascii format that will give you very large files ... There are also other output format like LMF or ECAT7. You must install those programs BEFORE you install Gate. <br><br>Hope you'll succeed, and don't hesitate to ask more questions :-)<br>Simon<br><br><div><span class="gmail_quote">2007/8/27, hadi taleshi <<a href="mailto:hadi.taleshi@gmail.com">hadi.taleshi@gmail.com</a> >:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div><br clear="all">I installed CLHEP ,Geant4, ,.. succesfuly in Linux.</div> <div>But when I try to install gate , i can't do it.</div> <div>i write </div> <div>: source env_gate.csh</div> <div> </div> <div>:The environment variable G4version is not defined yet.</div> <div>you must defin G4version before you can configure Gate<br> </div> <div>please help me in exact installation of Gate </div> <div> </div> <div> </div> <div>-- <br>Hadi Taleshi Ahangari<br>MSc. Tarbiat modarres University </div> <br>_______________________________________________<br>Gate-users mailing list<br><a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:Gate-users@lists.healthgrid.org">Gate-users@lists.healthgrid.org</a> <br><a onclick="return top.js.OpenExtLink(window,event,this)" href="http://lists.healthgrid.org/mailman/listinfo/gate-users" target="_blank">http://lists.healthgrid.org/mailman/listinfo/gate-users</a><br><br></blockquote> </div><br>