Accuracy in Geobegin

Sorry to disturb but even after fixing these the error persists, I attach the out file and err file. It is basically saying there is a small error (which I cannot see neither in the geoviewer nor elsewhere)…but it aborts when there are multiple calls for the same error. Is there any way to run this and avoid such issues? I attach the input. If I try to optimise all regions the location of the offending plane/point changes but then the run still stops after completing 5 cycles. I have also tried copying the x y z of one plane into the nearest one without success…

Sometimes by zooming in maybe 100 times, a white region is found which I think is just an artifact from the small scale. Is there any point of increasing the accuracy parameter?

monet.inp (1.4 MB)

monet.flair (2.3 MB)

monet004.err (570.4 KB)

it completes 5 cycles and then finishes with errors

EDIT: It runs by setting accuracy to 0.01..Does this sound reasonable ?

Hi everyone!

I attach a post related to another question on forum. See log and err files. They are basically saying there is a small error (which I cannot see neither in the geoviewer nor elsewhere)…but it aborts when there are multiple calls for the same error. Is there any way to run this and avoid such issues? I attach the input. If I try to optimise all regions the location of the offending plane/point changes but then the run still stops after completing 5 cycles. I have also tried copying the x y z of one plane into the nearest one without success…

Sometimes by zooming in maybe 100 times, a white region is found which I think is just an artifact from the small scale. Is there any point of increasing the accuracy parameter?

monet.inp (1.4 MB)

monet.flair (2.3 MB)

monet004.err (570.4 KB)

it completes 5 cycles and then finishes with errors

EDIT: It runs by setting accuracy to 0.01..Does this sound reasonable ?

Hi Marco,

Increasing the accuracy parameter is only a temporary fix that masks the underlying issue. As previously discussed in other threads, this approach can become problematic, especially in the case of detailed geometries: Geometry Errors with Lattices - #2

In your .err file, you can identify where most particles are encountering problems. I would recommend starting the debugging process from there.

Another possible source of issues could be touching bodies (e.g., coincident planes), although a definitive answer cannot be provided a priori. Occasionally, some spurious geometry precision errors may appear, but the code is able to recover from them.

Good luck with your geometry!
Cheers,
Daniele.

Hi Daniele,

Thanks! I believe I’ve solved it by setting the NY of several PLA to 0 instead of 1E-17 and by coinciding several planes. It can run on both Flair3.4/Fluka4.5.1 and on Flair2.3/Fluka2025.1. However on a cluster it still fails with segmentation fault (“Seed file not accepted: or corrupted…” and “2 Segmentation fault (core dumped) ${EXE} 2> $LOGF > $LOGF fluka run”).

I attach my final input if ever you want to check. Thanks!

monet1.inp (1.2 MB)

monet1.flair (2.2 MB)

Best wishes,
Marco