[Gate-users] PET Simulation Warning

[Xinjie Cao]

Dear all,

I got a warning from my voxelized phantom simulation log as follows,
-------- WWWW ------- G4Exception-START -------- WWWW -------
*** G4Exception : GeomNav1002
      issued by : G4Navigator::ComputeStep()
Track stuck or not moving.
          Track stuck, not moving for 10 steps
          in volume -hof_brain_physVol- at point
(94.23974773575026,-188.800064708837,299.9999999999999) (local point
(-0.2602522642497433,-0.3000647088369703,0.4999999999998863))
          direction:
(-0.3752814347046034,-0.3143147678848536,0.871992013412706) (local
direction: (-0.3752814347046034,-0.3143147678848536,0.871992013412706)).
          Potential geometry or navigation problem !
          Trying pushing it of 1e-07 mm ...Potential overlap in geometry!

*** This is just a warning message. ***
-------- WWWW -------- G4Exception-END --------- WWWW -------

And it looks like the root output data were very small whenever I got this
warning, I have no idea whether there is any correlation between the
warning and the small output, and I am curious whether this warning is a
severe problem or neglectable.

Any answer will be highly appreciated!

Thanks,
Xinjie
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