"Finished with ERRORS" in my first ever run/simulation

Running and Runtime Errors
1

Hi FLUKA/flair experts,

I am a very novice user of FLUKA/flair and for the past couple of days, I have been trying to run my first ever simulation. To make sure I did everything correctly, I followed the tutorial on https://www.youtube.com/watch?v=_NfOr5xpSp0 which seemed pretty straight-forward. When I got to running the simulation, I got the error Finished with ERRORS (everything on my program is the same as on the tutorial up till this stage). This is what I get in the output file:

- Running: tutorial_01
Dir: /home/weli/Documents/flair
Cmd: /usr/bin/nohup /usr/local/fluka/bin/rfluka -d -M 5 tutorial_01
/usr/bin/nohup: ignoring input

                               F L U K A

Dir: /usr/local/fluka
Data: /usr/local/fluka/data
Exec: /usr/local/fluka/bin/flukadpm
Input: /home/weli/Documents/flair/tutorial_01.inp
Initial seed already exists
Running fluka in /home/weli/Documents/flair/fluka_3005

======================== Running FLUKA for cycle # 1 ========================
Error: “/usr/local/fluka/bin/flukadpm” executable returned RC=2

What is the issue please?

As I mentioned earlier, I’m quite new to using this software, so I’m still finding my way around it. I would greatly appreciate clear and easy-to-follow guidance on this issue.

Thanks!

EDIT: I tried executing the check_fluka.sh file and I got:

check_fluka.sh

Thu 22 Aug 13:35:27 CEST 2024
Linux ubuntu 5.4.0-192-generic #212-Ubuntu SMP Fri Jul 5 09:50:13 UTC 2024 aarch64 aarch64 aarch64 GNU/Linux
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=20.04
DISTRIB_CODENAME=focal
DISTRIB_DESCRIPTION="Ubuntu 20.04.5 LTS"
NAME="Ubuntu"
VERSION="20.04.5 LTS (Focal Fossa)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 20.04.5 LTS"
VERSION_ID="20.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=focal
UBUNTU_CODENAME=focal


Checking python
	Version: 3.8-10 ok

Checking python tkinter module
	tkinter found

Checking tk library
	Tk Version= 8.6 ok

Checking python imaging
	python-imaging-tk installed

Checking gnuplot
	gnuplot 5.2.8 ok

Checking memory
	Ram: 10175596 kb ok
	Swap: 4194300 kb ok

Checking CPU
============================== WARNING ==============================
Unable to determine CPU type/speed
Please ensure a minimum of 1.0 GHz of CPU speed..
======================================================================

Checking X11
	X11 dimension: 1512x945 ok
	X11 depth: 24 ok

Checking flair
	flair directory: /usr/local/flair
============================== ERROR ==============================
Cannot load flair from directory /usr/local/flair
Please verify flair installation
======================================================================

However, I cannot seem to understand how it cannot access this file (I have enabled all possible permissions for this file just to make sure). I think this is an installation issue.

Any help is greatly appreciated!

2

Dear Samuel,

As a beginner, you may want to look at the material of the latest FLUKA course: 2024 beginner course - Madrid (15-19 April 2024): Contribution List · Indico

The actual error message of FLUKA will be in the xxx001.out, xxx001.err or xxx001.log files.

Cheers,
David

1 Like
3

Dear Dávid,

Thank you for your quick response!

I have since updated my post (see from EDIT below). I am not a frequent user of Linux either, so it might be that although flair is loading up OK, the installation itself might still be faulty.

As for the latest FLUKA course material you sent, I have actually been working through it, but I encountered this issue when I tried to run my first simulation. I am eager to learn and explore FLUKA further, but this problem is making it difficult to proceed.

Would it be possible for me to provide access remotely to an expert to assist me in resolving this issue? This would greatly help me in getting started with FLUKA.

Thank you!

4

Apart from the apparent Flair installation issue, can you please look at and report the content of the tutorial_01001.log, tutorial_01001.err and tutorial_01001.out files? You should find them in the directory

/home/weli/Documents/flair/fluka_3005

where the final number changes from run to run. This most likely will explain the FLUKA run failure.

1 Like
5

Hi Francesco,

The contents are the following:

tutorial_01001.log

/usr/local/fluka/bin/rfluka: 298: /usr/local/fluka/bin/flukadpm: Exec format error

tutorial_01.inp

TITLE

*Set the defaults for precision simulations
DEFAULTS                                                              PRECISIO
*Define the beam characteristics
BEAM
*Define the beam position
BEAMPOS
GEOBEGIN                                                              COMBNAME
    0    0          
*Black body
SPH blkbody    0.0 0.0 0.0 100000.0
*Void sphere
SPH void       0.0 0.0 0.0 10000.0
*Cylindrical target
RCC target     0.0 0.0 0.0 0.0 0.0 10.0 5.0
END
*Black hole
BLKBODY      5 +blkbody -void
*Void around
VOID         5 +void -target
*Target
TARGET       5 +target
END
GEOEND
*..+....1....+....2....+....3....+....4....+....5....+....6....+....7..
ASSIGNMA    BLCKHOLE   BLKBODY
ASSIGNMA      VACUUM      VOID
ASSIGNMA      COPPER    TARGET
USRBIN            17    ENERGY       -21      10.0                15.0Energyloss
USRBIN            0.                  0.       200       200       200 &
*Set the random number seed
RANDOMIZ         1.0         1
*Set the number of primary histories to be simulated in the run
START            100
STOP

There seems to be no tutorial_01.001.err file.

Thank you!

6

Dear Samuel,

It seems to be from the error message and the output of the check_fluka.sh script that you are trying to run FLUKA on a PC with an ARM-based processor.

Currently, no ARM version of FLUKA is available. You may try to use some virtualization software to emulate the x86/x64 instructions, or if it is a Mac, you can use the FLUKA version compiled for MacOS with Mx processors.

Cheers,
David

1 Like
7

Dear Dávid,

It seems I was overcomplicating things. I had been working within an Ubuntu virtual machine on macOS, but I’ve now installed everything directly on macOS, and it’s working perfectly. I finally managed to get the simulation running.

Thank you so much (and also Francesco for his input).

Cheers!

Samuel Grima

1 Like