Hi again! I solved the problem myself! I was running another visualisation using openGL that seemingly interfered with my benchmark run... now everything seems to be in order. /ida <div class="gmail_quote">Den 31 augusti 2009 08.41 skrev Ida Häggström <<a href="mailto:ida.haggstrom@radfys.umu.se">ida.haggstrom@radfys.umu.se</a>>: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hi all! I've just installed Gate and want to run the PET benchmark to verify my installation... I just run the unaltered "benchmarkPET.mac" in my Gate and it starts out fine. After some lines the run is stopped and I get the error ---------- WARNING: G4VisManager::EndOfEvent: Event keeping suspended. The number of events exceeds the maximum that may be kept, 100. ---------- I've tried googling the error, but I didn't find anything useful. I'm not at all familiar with Gate or Geant4 so I really have no clue here. Should I change some setting somewhere, and how in that case? thanks a lot! /Ida </blockquote></div>