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--></style></head><body lang=EN-US link=blue vlink="#954F72"><div class=WordSection1><pre>Have you enable ROOT software before run macro file?</pre><p class=MsoNormal>By “ source /PATH_TO/root/bin/thisroot.sh”</p><p class=MsoNormal> </p><p class=MsoNormal>I tried your code. It generated sim.root.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Regards, </p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Nguyễn Trần Thọ </p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><a href="https://pnt.edu.vn">https://pnt.edu.vn</a> <br><br><br></p><p class=MsoNormal><o:p> </o:p></p><div style='mso-element:para-border-div;border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='border:none;padding:0in'><b>From: </b><a href="mailto:M.P.Nguyen@tudelft.nl">Minh Nguyen - TNW</a><br><b>Sent: </b>Saturday, October 27, 2018 5:12 AM<br><b>To: </b><a href="mailto:gate-users@lists.opengatecollaboration.org">'gate-users@lists.opengatecollaboration.org'</a><br><b>Subject: </b>Re: [Gate-users] Cannot get the Ntuple tree from ROOT output</p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-GB>Dear GATE users,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>I am simulating positron range for an F18 source. To do that, I need to get ‘posannihil’ from ntuple branch of the ROOT output. Although I enabled the ntuple flag, I cannot get any ntuple output:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>/gate/output/root/enable<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>/gate/output/root/setFileName sim<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>/gate/output/root/setRootNtupleFlag 1<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>I tested several GATE versions and several PET system definition<u>s</u> (http://wiki.opengatecollaboration.org/index.php/Users_Guide:Defining_a_system). I attached here my complete macro. </span>Could anyone help me to figure it out?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thank you.<o:p></o:p></p><p class=MsoNormal>Regards,<o:p></o:p></p><p class=MsoNormal>Minh<span lang=EN-GB><o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>