Hi Guo, There is a bug in gjs program on 64 bits architectures ... But it was fixed a certain time ago. See the following mail by Samuel Burg who fixed this bug. The patch is attached to this mail. Simon ---------- Forwarded message ---------- From: Samuel BURG <<a href="mailto:samuel_burg@yahoo.fr" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">samuel_burg@yahoo.fr</a>> Date: 2 juil. 2007 13:34 Subject: [Gate-users] ClusterTools - GJS jobsplitter - x86_64 patch To: Users Gate <<a href="mailto:gate-users@lists.healthgrid.org" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">gate-users@lists.healthgrid.org</a>> Hello Jan De Beenhouwer, Hello Patrice Descourt, thank you very much for your work. Hello everybody else, This is a merge of 2 patchs for x86_64 arch : patch from Patrice Descourt patch from Jan De Beenhouwer everyone who uses the jobsplitter in 64 bits architecture should replace 3 lines in src/GateMacFileParser.cc in GateMacfileParser::AddPWD(G4String key) replace     unsigned int pos=filename.rfind("/"); by    long unsigned int pos= filename.rfind("/"); in void GateMacfileParser::FormatMacline() replace     unsigned int size=0; by    G4int size=0; in void GateMacfileParser::RemoveExtension() replace     unsigned int pos= macline.rfind(".rndm"); by    long unsigned int pos=macline.rfind(".rndm"); The diff output : [lucie@node_2 src]# diff GateMacfileParser.cc.old GateMacfileParser.cc.new 441c441 <  unsigned int pos=filename.rfind("/"); --- >  long unsigned int pos=filename.rfind("/"); 519c519 <  unsigned int size=0; --- >  G4int size=0; 602c602 <  unsigned int pos=macline.rfind(".rndm");//the only valid extension --- >  long unsigned int pos=macline.rfind(".rndm");//the only valid extension Best regards, Samuel BURG <hr size="1">