Hi Bassim, Do you mean vGate v2.1, or Gate v6.1? If you mean vGate v2.1, it has the Gate v6.2, and it seems that they haven't implemented some geometry yet. <a href="http://wiki.opengatecollaboration.org/index.php/Users_Guide_V6.2:Defining_a_geometry">http://wiki.opengatecollaboration.org/index.php/Users_Guide_V6.2:Defining_a_geometry</a> If you mean Gate v6.1, I'm afraid I'm not sure about your problem... You should be able to check the insert parameters from "help" Taku <div class="gmail_quote">2012/12/19 bassim <<a href="mailto:bassim.aklan@imp.uni-erlangen.de" target="_blank">bassim.aklan@imp.uni-erlangen.de</a>> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hallo Gate users, I want to use the geometry shape "parallelepiped" in my Gate simulation (vGatev6.1). When I use the following commands in my camera mac file: /gate/world/daughters/name test /gate/world/daughters/insert parallelepiped ....... I got the following erros: control/execute mac/test.mac parameter value is not listed in the candidate List. ***** Illegal parameter (0) </gate/world/daughters/insert parallelepiped> * Any help. Thanks in Advance. Best regards, Bassim -- Bassim Aklan, M.Sc. Institute of Medical Physics - Section for MR Imaging University of Erlangen-Nuremberg Henkestr. 91 91052 Erlangen, Germany phone: <a href="tel:%2B49-%280%299131%2F85-25545" value="+4991318525545" target="_blank">+49-(0)9131/85-25545</a> Mobile phone: <a href="tel:%2B49-17665299782" value="+4917665299782" target="_blank">+49-17665299782</a> <a href="mailto:bassim.aklan@imp.uni-erlangen.de" target="_blank">bassim.aklan@imp.uni-erlangen.de</a> Homepage: <a href="http://www.imp.uni-erlangen.de/mri" target="_blank">www.imp.uni-erlangen.de/mri</a> _______________________________________________ Gate-users mailing list <a href="mailto:Gate-users@lists.opengatecollaboration.org" target="_blank">Gate-users@lists.opengatecollaboration.org</a> <a href="http://lists.opengatecollaboration.org/mailman/listinfo/gate-users" target="_blank">http://lists.opengatecollaboration.org/mailman/listinfo/gate-users</a> </blockquote></div> -- Hokkaido University, Graduate school of medicine, medical physics and engineering D1 Taku Yamanaka <a href="mailto:takuyama@med.hokudai.ac.jp" target="_blank">takuyama@med.hokudai.ac.jp</a> --