Detect: histogram overflow and subsequent crash

[KillMartin (Martin)]

Dear FLUKA experts,

I am running a model that involving using DETECT cards. Fluka seems handled it okay and produced the required results even I had the “Detect: Histogram overflow” errors in several previous runs. However, after some tweaking with the energy range of the DETECT cards, I’m also getting the error with code RC= 144 and the simulation simply won’t start. Could anyone point out what I did wrong with my setup? The relevant files are attached.
Dual.inp (4.8 KB)
Dual_01.out (723 Bytes)
Dual_01001.err (8.8 KB)
Dual_01001.out (114.6 KB)
GCR_N.txt (6.4 KB)

Thanks in advance.
Martin

[horvathd (Dávid Horváth)]

Dear Martin,

thank you for reporting the issue, I can confirm the crash is caused by a bug related to the DETECT scoring. A fix will be implemented in the next release.

A workaround is to increase the maximum energy of the scorings, but this will reduce the resolution of the detector.

The “Detect: Histogram overflow” line in the .err file is only a warning message, indicating that the energy deposition in the detector region was higher than the set energy, thus it was not recorded. The warning message is only repeated 100 times, then it is inhibited.

Cheers,
David

[horvathd (Dávid Horváth)]

Dear Martin,

please update to the newly released FLUKA 4-1.1 version, it contains the fix for this bug.

Release of FLUKA 4-1.1

Dear FLUKA users, It is our pleasure to announce that a new minor release of the FLUKA code, FLUKA 4-1.1, has been issued and can be downloaded from https://fluka.cern/download/latest-fluka-release Please see the release notes for a detailed account of the included bug fixes. With our best regards, The FLUKA developer team at CERN and collaborating institutes

Cheers,
David

[KillMartin (Martin)]

Dear David,

Thank you for your time and help.

Martin

[KillMartin (Martin)]

Dear @horvathd and other FLUKA experts:

The problem I described in

Detect: histogram overflow and subsequent crash

Dear FLUKA experts, I am running a model that involving using DETECT cards. Fluka seems handled it okay and produced the required results even I had the “Detect: Histogram overflow” errors in several previous runs. However, after some tweaking with the energy range of the DETECT cards, I’m also getting the error with code RC= 144 and the simulation simply won’t start. Could anyone point out what I did wrong with my setup? The relevant files are attached. Dual.inp (4.8 KB) Dual_01.out (723 Byt…

persists after I updated flair to 3.1-8 and FLUKA to 4-1.1. I would still get the error code RC=144 and the simulation would not run. Maybe there is some other reason?

Thank you for your help.

Martin

[horvathd (Dávid Horváth)]

Dear Martin,

did you recompile the source routine as well?

Cheers,
David

[KillMartin (Martin)]

Dear @horvathd,

Ah that might be the case, I did not recompile the source routine. Could you show me how to do that?

Thanks.

Martin

[horvathd (Dávid Horváth)]

Dear Martin,

as far as I could tell, you used this source routine to sample from your spectrum:

Sampling from energy spectra

For more complex simulations one often needs a beam that is not mono-energetic but follows a specific energy distribution. This feature is provided “out-of-the box” for CERN FLUKA by the CERN-FLUKA-spectra-sampling.tgz (21.8 KB) user routine package (version 1.4) that can be fully configured via the input file. IMPORTANT NOTICE: With the release of FLUKA 4.0.0 the package had to be upgraded. In order to use it with FLUKA version >= 4.0.0 please re-download from the link above. The provided c…

You probably only need to run the make command again, to create the new executables.

Cheers,
David

[KillMartin (Martin)]

Dear @horvathd,

Thank you for your time.

Martin