Example using Flair

Running and Runtime Errors
1

Hello,
I am new in FLAIR and I tried to follow the tutorial in the video: https://www.youtube.com/watch?v=SjhDqIo5cvk&t=26s
Unfortunatelly, it says that it finished with errors. The same happened when I followed the instructions from http://flair.web.cern.ch/flair/tutorial_fluka.html
Any suggestions why this happens?
Thank you very much in advance.
Best regards,
Pinelopi

2

Hi @pchristo,

There is any number of issues that can cause a run to “finish with errors”. You will need to provide more details and the specific input file that you are trying to run.

In the meantime, if you are simply loading the “basic” input in Flair without changing anything in the input file, the run is launched by default with 200GeV protons and 5000 primaries per cycle. It may be that this takes too long on your machine. Does the run stop (almost) immediately or after having run for some time?

1 Like
3

Could you please post your .flair (and .inp) files

1 Like
4

Hello, thank you for the quick response. Yes it stops (almost) immediately. I will post my flair and inp files
tutorial.flair (857 Bytes) tutorial.inp (893 Bytes) tutorial.out (542 Bytes)

5

OK, the input file is fine, in fact it is exactly the “basic” input without any change. The problem therefore seems to be related to your installation.

  1. Can you confirm what is your FLUKA installation directory? Is it /mnt/c/WSL/file/fluka2011-3.0/?
  2. Can you send us the output of the following command: echo $PATH ? Just run it in the Linux terminal (you don’t need to be in any particular directory when you do this).
6

Hi Pinelopi,

The error code 127 suggests a file permission error.

In which directory are you trying to run?
Please, post the result of the command: pwd, in that folder.

Cheers,
David

7

Hello,

  1. Yes that is the path were the FLUKA is installed.
  2. image
    image1920Ă—1080 172 KB
9

It seems like the relevant FLUKA entry is not in the PATH. Please do the following:

Go to your home directory: cd ~
Open the .bashrc file: less .bashrc
Scroll to the bottom with PageDown or the down arrow.

Is there an entry similar to this?
export PATH=$PATH:/usr/local/fluka/bin/

Please also take a look at @horvathd’s question above.

10

Hello,
there is no such entry:

image
image1920Ă—1080 205 KB

11

Hi!

can you post the result of the commend: which rfluka ?

Cheers,
David

12

Hello!
I entered

which rfluka

as a command in Ubuntu but nothing happened.
Cheers,
Pinelopi

13

Hi,

did you set up the Fluka Directory in the Flair config?

Cheers,
David

14

Hey,
are there instructions on how to do that ? :sweat_smile:
Cheers.
Pinelopi

15

When Flair doesn’t find Fluka, a yellow warning pops up, with the button “Preferences”, which opens the Flair config dialog.

Can you check your settings, with the help of the picture below?

flair_config
flair_config1025Ă—849 89 KB

16

Oh yes it was saying that so I changed it according to this picture:

image
image1920Ă—1080 202 KB

17

Hi,

Did you try to open Flair and run from your home directory? (/home/darwin)

Cheers,
David

18

Hello,
do you mean to change the directory shown in the picture?

image
image1920Ă—1080 288 KB

Thank you for helping me!
Best wishes,
Pinelopi

19

Hi Pinelopi,

probably I wasn’t clear. I meant if you could run the basic input in that directory, instead in /mnt/c/WSL

Cheers,
David

20

Hello,
you mean to change the FLUKA directory in the image to /home/darwin ?
Then it says that the fluka exetuble is not found.

image
image1920Ă—1080 205 KB

21

Hi

No, you don’t need to change the settings, just run a simulation in the directory /home/darwin

Cheers,
David