Dnear according to no overlapping ORs

Dear fluka experts,
When I run an .flair file, an error happened:
86 VOXEL083 Dnear according to no overlapping ORs ***
*** Region # 87 VOXEL084 Dnear according to no overlapping ORs ***
*** Region # 88 VOXEL085 Dnear according to no overlapping ORs ***
*** Region # 89 VOXEL086 Dnear according to no overlapping ORs ***
*** Region # 90 VOXEL087 Dnear according to no overlapping ORs ***
*** Region # 91 VOXEL088 Dnear according to no overlapping ORs ***
*** Region # 92 VOXEL089 Dnear according to no overlapping ORs ***
*** Region # 93 VOXEL090 Dnear according to no overlapping ORs ***
*** Region # 94 VOXEL091 Dnear according to no overlapping ORs ***
*** Region # 95 VOXEL092 Dnear according to no overlapping ORs ***
*** Region # 96 VOXEL093 Dnear according to no overlapping ORs ***
*** Region # 97 VOXEL094 Dnear according to no overlapping ORs ***
*** Region # 98 VOXEL095 Dnear according to no overlapping ORs ***
However, in previous FLUKA version, there is no error hinted. The relevant file is attachednew.tgz (1020.1 KB) .
Thanks in advance.
Best regards,
Xiaoman

Dear Xiaoman,

these lines in the output is always present, but it is not an error.

From the FLUKA Manual:

Then, for each region in whose description the OR operator is used, one line similar to the following is printed at the end of the geometry output:
*** Region # 2 Dnear according to no overlapping ORs ***
*** Region # 3 Dnear according to possible overlapping ORs ***
This information concerns the possibility that random seed sequences might not be reproducible, a technical issue which does not affect the quality of the results but can be important for debugging or other purposes.

https://flukafiles.web.cern.ch/flukafiles/manual/9.1.html

The possible issue in your case, is that you are enabled, the geometry debugger on the GEOEND card, with almost 54 million different locations. Which would take a lot of time to process.

Plus, the output file not written continuously, but in chunks. That’s why the list of regions are cut in half.

I would suggest not to use the geometry debugging on the GEOEND card, since the Flair’s Gemoetry tab is more powerful.

Cheers,
David