<html><body><div>Hello,I have created a simple PET geometry with voxel phantom that already works when run on CPU. Hovewer, I would like to try GPU acceleration as well, but when I modify the code and run it, I receive following error: :: Stacks init :: Materials init :: Phantom init :: Activities init :: Start GPU :: Rnd ok :: Generation ok WARNING - GPU reachs max step :: Tracking ok :: Stop GPU (time 1.734591e-01 s) -------- EEEE ------- G4Exception-START -------- EEEE ------- *** G4Exception : GeomNav0003 issued by : G4PhantomParameterisation::GetReplicaNo() Point outside voxels! localPoint - (-nan,-nan,-nan) - is outside container solid: pacient_solid *** Fatal Error In Argument *** core dump *** -------- EEEE -------- G4Exception-END --------- EEEE ------- *** G4Exception: Aborting execution *** I thought it might be just me making a mistake somewhere but I receive exactly the same error when launching GPU PET macro from the example folder. I am grateful for any advice regarding the matter and what might be causing it. Using GATE 7.2.Best regards, Jiri TersCzech Technical University in Prague </div></body></html>