Running on current master... If I run examples/advanced/human_phantom with /gps/position 0 0 40 cm /gps/pos/type Point /gps/ang/type iso /gps/particle gamma //run/beamOn 10 I get GeomNav1002 below for several of the events. Occasionally I get “time going backwards” as well. There are no overlaps nearby If I change G4Elilpsoid to a G4Box, all’s well. Note: (0,0,40) cm is right on a corner of the G4Ellipsoid in G4MIRDPancreas.cc. A zcut makes the corner. -------- WWWW ------- G4Exception-START -------- WWWW ------- *** G4Exception : GeomNav1002 issued by : G4Navigator::ComputeStep() Stuck Track: potential geometry or navigation problem. Track stuck, not moving for 10 steps. Current phys volume: 'physicalPancreas' - at position : (0,0,400) in direction: (-0.7590753513494927,0.2292508358073039,0.609301785041942) (local position: (30,-6.123233995736764e-15,7.960204194457785e-15)) (local direction: (0.6093017850419421,-0.229250835807304,-0.7590753513494926)). Previous phys volume: 'physicalTrunk' Likely geometry overlap - else navigation problem ! *** Trying to get *unstuck* using a push - expanding step to 1e-07 (mm) ... Potential overlap in geometry ! *** This is just a warning message. *** -------- WWWW -------- G4Exception-END --------- WWWW -------
Can you please specify what version of Geant4 you're running on? Are you running on the current Master?
OK, I now see it. You are on the Master...
There is a Merge Request, currently under testing (https://gitlab.cern.ch/geant4/geant4-dev/merge_requests/710), where a bug in the geometry setup of the MIRD phantom has been fixed... John, can you see if that makes a difference?
Already tried it. It makes no difference. The MR is an unrelated problem (I have been in touch with Susanna). John
The problem has been fixed by Evgueni and the fix is pushed to the current Master. It will be included in the next patch release.
