Hello again! I've looked a bit more in the benchmark (cylindrical PET) camera to try and understand what is causing the geomTest Error. It seems most objects are defined to be just beside eachother, e.g. a daughter shares a common side with its mother and so on. I thought this should be OK and not classified as overlap?? The code for the camera setup is found below. Maybe someone else has run the geometry check and gotten similar results as me? Can this error be due to some faulty installation or something else? Any suggestsions are more than welcome! /Ida .......................................................................................... # CYLINDRICAL /gate/world/daughters/name cylindricalPET /gate/world/daughters/insert cylinder /gate/cylindricalPET/placement/setTranslation 0.0 0.0 0.0 cm /gate/cylindricalPET/geometry/setRmax 52.0 cm /gate/cylindricalPET/geometry/setRmin 39.9 cm /gate/cylindricalPET/geometry/setHeight 40.2 cm /gate/cylindricalPET/setMaterial Air /gate/cylindricalPET/vis/forceWireframe /gate/cylindricalPET/vis/setColor white # HEAD /gate/cylindricalPET/daughters/name head /gate/cylindricalPET/daughters/insert box /gate/head/placement/setTranslation 44.0 0.0 0.0 cm /gate/head/geometry/setXLength 8.0 cm /gate/head/geometry/setYLength 32.0 cm /gate/head/geometry/setZLength 40.2 cm /gate/head/setMaterial Air /gate/head/vis/setVisible 0 # END-SHIELDING /gate/head/daughters/name endshielding /gate/head/daughters/insert box /gate/endshielding/placement/setTranslation 0.0 0.0 0.0 cm /gate/endshielding/geometry/setXLength 8.0 cm /gate/endshielding/geometry/setYLength 32.0 cm /gate/endshielding/geometry/setZLength 1.0 mm /gate/endshielding/setMaterial Lead /gate/endshielding/repeaters/insert cubicArray /gate/endshielding/cubicArray/setRepeatNumberX 1 /gate/endshielding/cubicArray/setRepeatNumberY 1 /gate/endshielding/cubicArray/setRepeatNumberZ 2 /gate/endshielding/cubicArray/setRepeatVector 0.0 0.0 40.1 cm /gate/endshielding/vis/setColor white # SEPTA /gate/head/daughters/name septa /gate/head/daughters/insert box /gate/septa/placement/setTranslation -1.5 0.0 0.0 cm /gate/septa/geometry/setXLength 5.0 cm /gate/septa/geometry/setYLength 32.0 cm /gate/septa/geometry/setZLength .5 mm /gate/septa/setMaterial Tungsten /gate/septa/repeaters/insert cubicArray /gate/septa/cubicArray/setRepeatNumberX 1 /gate/septa/cubicArray/setRepeatNumberY 1 /gate/septa/cubicArray/setRepeatNumberZ 3 /gate/septa/cubicArray/setRepeatVector 0.0 0.0 10.0 cm /gate/septa/vis/setColor blue # MODULE /gate/head/daughters/name module /gate/head/daughters/insert box /gate/module/placement/setTranslation 2.5 0.0 0.0 cm /gate/module/geometry/setXLength 3.0 cm /gate/module/geometry/setYLength 8.0 cm /gate/module/geometry/setZLength 10.0 cm /gate/module/setMaterial Air /gate/module/vis/setVisible 0 # BLOCK /gate/module/daughters/name block /gate/module/daughters/insert box /gate/block/placement/setTranslation 0.0 0.0 0.0 cm /gate/block/geometry/setXLength 30 mm /gate/block/geometry/setYLength 15.9 mm /gate/block/geometry/setZLength 19.9 mm /gate/block/setMaterial Air /gate/block/vis/setVisible 0 # C R Y S T A L /gate/block/daughters/name crystal /gate/block/daughters/insert box /gate/crystal/placement/setTranslation 0.0 0.0 0.0 cm /gate/crystal/geometry/setXLength 3.0 cm /gate/crystal/geometry/setYLength 3.0 mm /gate/crystal/geometry/setZLength 3.8 mm /gate/crystal/setMaterial Air /gate/crystal/vis/setVisible 0 # LSO layer /gate/crystal/daughters/name LSO /gate/crystal/daughters/insert box /gate/LSO/placement/setTranslation -0.75 0.0 0.0 cm /gate/LSO/geometry/setXLength 1.5 cm /gate/LSO/geometry/setYLength 3.0 mm /gate/LSO/geometry/setZLength 3.8 mm /gate/LSO/setMaterial LSO /gate/LSO/vis/setColor green # BGO layer /gate/crystal/daughters/name BGO /gate/crystal/daughters/insert box /gate/BGO/placement/setTranslation +0.75 0.0 0.0 cm /gate/BGO/geometry/setXLength 1.5 cm /gate/BGO/geometry/setYLength 3.0 mm /gate/BGO/geometry/setZLength 3.8 mm /gate/BGO/setMaterial BGO /gate/BGO/vis/setColor yellow # R E P E A T C R Y S T A L /gate/crystal/repeaters/insert cubicArray /gate/crystal/cubicArray/setRepeatNumberX 1 /gate/crystal/cubicArray/setRepeatNumberY 5 /gate/crystal/cubicArray/setRepeatNumberZ 5 /gate/crystal/cubicArray/setRepeatVector 0.0 3.2 4.0 mm # R E P E A T BLOCK /gate/block/repeaters/insert cubicArray /gate/block/cubicArray/setRepeatNumberX 1 /gate/block/cubicArray/setRepeatNumberY 5 /gate/block/cubicArray/setRepeatNumberZ 5 /gate/block/cubicArray/setRepeatVector 0.0 1.6 2.0 cm # R E P E A T MODULE /gate/module/repeaters/insert cubicArray /gate/module/cubicArray/setRepeatNumberX 1 /gate/module/cubicArray/setRepeatNumberY 4 /gate/module/cubicArray/setRepeatNumberZ 4 /gate/module/cubicArray/setRepeatVector 0.0 8.0 10.0 cm # R E P E A T HEAD /gate/head/repeaters/insert ring /gate/head/ring/setRepeatNumber 8 /gate/cylindricalPET/moves/insert orbiting /gate/cylindricalPET/orbiting/setSpeed 0 deg/s #.1875 deg/s /gate/cylindricalPET/orbiting/setPoint1 0 0 0 cm /gate/cylindricalPET/orbiting/setPoint2 0 0 1 cm # A T T A C H S Y S T E M /gate/systems/cylindricalPET/rsector/attach head /gate/systems/cylindricalPET/module/attach module /gate/systems/cylindricalPET/submodule/attach block /gate/systems/cylindricalPET/crystal/attach crystal /gate/systems/cylindricalPET/layer0/attach LSO /gate/systems/cylindricalPET/layer1/attach BGO # A T T A C H C R Y S T A L SD /gate/LSO/attachCrystalSD /gate/BGO/attachCrystalSD