Segmentation fault while running a simulation

LAMMPS LAMMPS General Discussion
1

lmp_ubuntu:18362 terminated with signal 11 at PC=55f3b7ddfb32 SP=7fff1a9fa320. Backtrace:
/home/omololu/LAMMPS/lammps-23Jun2022/src/lmp_ubuntu(+0x486b32)[0x55f3b7ddfb32]
/home/omololu/LAMMPS/lammps-23Jun2022/src/lmp_ubuntu(+0x487721)[0x55f3b7de0721]
/home/omololu/LAMMPS/lammps-23Jun2022/src/lmp_ubuntu(+0x465637)[0x55f3b7dbe637]
/home/omololu/LAMMPS/lammps-23Jun2022/src/lmp_ubuntu(+0x1e0c93)[0x55f3b7b39c93]
/home/omololu/LAMMPS/lammps-23Jun2022/src/lmp_ubuntu(+0x187ce9)[0x55f3b7ae0ce9]
/home/omololu/LAMMPS/lammps-23Jun2022/src/lmp_ubuntu(+0xc0138)[0x55f3b7a19138]
/home/omololu/LAMMPS/lammps-23Jun2022/src/lmp_ubuntu(+0xc072e)[0x55f3b7a1972e]
/home/omololu/LAMMPS/lammps-23Jun2022/src/lmp_ubuntu(+0x9ac0c)[0x55f3b79f3c0c]
/lib/x86_64-linux-gnu/libc.so.6(+0x29d90)[0x7f75b147bd90]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x80)[0x7f75b147be40]
/home/omololu/LAMMPS/lammps-23Jun2022/src/lmp_ubuntu(+0x9c0d5)[0x55f3b79f50d5]

the above message appeared after a while of running the simulation, even though it prints the simulation results halfway. It is not able to complete the simulation. Please what can I do to fix this

2

Unfortunately, there is no usable information here to be able to tell what went wrong, thus it is impossible to give advice. What does “after a while” mean?

It would be helpful, if you would recompile your executable with debug info included (“-g” flag added to LINKFLAGS and CCFLAGS, followed by “make clean-ubuntu; make ubuntu”) and then run within a debugger to produce a stack trace as shown here: 11.4. Debugging crashes — LAMMPS documentation

Since you have partial output, does it look correct? Are energies reasonable? Are there any indications or warnings? Do you have a trajectory? If yes, have you visualized it and does it look reasonable? Or is there anything unusual, especially toward the end?

Can you try and set up a (much) smaller system with fewer atoms that reproduces the same kind of crash, so that it will be easier to debug?