restG4: no energy deposition

Hello,

I’m running restG4 for the simulation of µp elastics w/ p detected in an hydrogen-filled TPC.
I successfully ran the simulation on a simplified setup.
Now I’m trying to use a detailed description, in gdml form, of the TPC.
Problem: as told in the title of this ticket, energy deposit is zero, see (excerpted for restG4 stdout, same for all 10 events in my simulation):

Event Deposited energy in sensitive volume:  0

Has anybody an idea about the reason for this?
My guess is that my sensitive volume turns out to not sit on the path of the particles. This,
event though I proceed just as before w/ my simplified geometry.
Then how can I check this? Or any other possible explanation you can think of…

Yann