# Segmentation fault error in positron lifetime calculation!

**URL:** <https://discourse.abinit.org/t/segmentation-fault-error-in-positron-lifetime-calculation/3569>\
**Category:** Ground state\
**Tags:** installation, compilation, parallelism\
**Created:** [August 13, 2024, 7:12pm UTC](https://discourse.abinit.org/t/segmentation-fault-error-in-positron-lifetime-calculation/3569 "2024-08-13T19:12:17Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![vinod](https://discourse.abinit.org/user_avatar/discourse.abinit.org/vinod/32/399_2.png) [@vinod](https://discourse.abinit.org/u/vinod)\
**Post date:** [August 13, 2024, 7:12pm UTC](https://discourse.abinit.org/t/segmentation-fault-error-in-positron-lifetime-calculation/3569/1 "2024-08-13T19:12:17Z")

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Hello all,  
I am calculating positron lifetime of CsI compound with a one vacancy.  
Calculation is not running in HPC cluster with showing error of **Segmentation fault**.  
Also it is showing error like **backtrace** , can anyone please tell me how to add flag of **backtrace** to compile abinit.  
Here is my attached input file, error, log…

The script .sh file is here…

_ **#!/bin/bash** _  
_ **#SBATCH -N 1 # Number of nodes** _  
_ **#SBATCH --ntasks-per-node=48 # Number of cores per** _  
_ **#SBATCH --error=job.%J.err # Name of output file** _  
_ **#SBATCH --output=job.%J.out # Name of error file** _  
_ **#SBATCH --time=96:00:00 # Time take to execute the** _  
_ **#SBATCH --job-name=“csi4”** _  
_ **#SBATCH --partition=standard** _

_ **export OMP\_NUM\_THREADS=1** _  
_ **export OMP\_PROC\_BIND=false** _  
_ **export OMP\_STACKSIZE=600M** _  
_ **ulimit -s unlimited** _

_ **time mpirun -ppn 48 -np 48 abinit csi\_4.abi \> csi\_4.log** _

[csi\_4.abi](https://discourse.abinit.org/uploads/short-url/cysRY1XpavMuOUf33r1xlfEnvNC.abi) (5.7 KB)  
[csi\_4.log](https://discourse.abinit.org/uploads/short-url/7DfsXZC1TGewhqTT7CSYx20STxt.log) (64.6 KB)  
[err.txt](https://discourse.abinit.org/uploads/short-url/fcJ9QiWRFdII7a91FkMt3YAv7DT.txt) (25.0 KB)

Thank you in advance!