Dear FLUKA experts, In my other post, I am using USERDUMP routine to record the energy and trajectories of e+ and e-, and eventually I fixed my problem with a new mgdraw.f script which worked smoothly. Now I want to do the same thing for a new setup, to record the secondaries flowing from region ’…

You have (at least) one flaw in your geometry, resulting in one micron layer of blackhole at z=0, which prevents any particle from getting further. This is due to the fact that the out1 cylinder starts at z=0.0001 cm and the preceding innerpre cylinder ends at z=0, letting the BLKBODY region come in…

You inverted the region names, thereby asking for the opposite flow. (Also, you keep calling the geometry routine making the region number to name conversion at each boundary crossing, which may have a considerable cost in CPU time, rather than calling the one making the region name to number conve…

Thank you for pointing that out, however, after reversing the region, I still couldn’t get any output… (I noticed in your newly implemented script, you used LOGICAL LFIRST instead of LOGICAL LFCOPE I am not sure if it might cause differences in simulations so I kept working with my old script…

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