Segmentation fault while turning off particle interaction

Hi all,

I use "pair_style none" to turn off the particle interaction.

But it reports the following error.

[msspc12:10573] *** Process received signal ***
[msspc12:10573] Signal: Segmentation fault (11)
[msspc12:10573] Signal code: Address not mapped (1)
[msspc12:10573] Failing at address: 0x3b8
[msspc12:10573] [ 0] /lib/x86_64-linux-gnu/libpthread.so.0(+0xfcb0) [0x7fdbfd393cb0]
[msspc12:10573] [ 1] liggghts(_ZN9LAMMPS_NS11FixWallGran4initEv+0xa8) [0x7d1208]
[msspc12:10573] [ 2] liggghts(_ZN9LAMMPS_NS6Modify4initEv+0x248) [0xa19aa8]
[msspc12:10573] [ 3] liggghts(_ZN9LAMMPS_NS6LAMMPS4initEv+0x33) [0x9e79f3]
[msspc12:10573] [ 4] liggghts(_ZN9LAMMPS_NS3Run7commandEiPPc+0x23f) [0xb0854f]
[msspc12:10573] [ 5] liggghts(_ZN9LAMMPS_NS5Input15command_creatorINS_3RunEEEvPNS_6LAMMPSEiPPc+0x2e) [0x9dd3be]
[msspc12:10573] [ 6] liggghts(_ZN9LAMMPS_NS5Input15execute_commandEv+0x7c2) [0x9d85b2]
[msspc12:10573] [ 7] liggghts(_ZN9LAMMPS_NS5Input4fileEv+0x4c2) [0x9da3f2]
[msspc12:10573] [ 8] liggghts(main+0x49) [0x567b69]
[msspc12:10573] [ 9] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed) [0x7fdbfcfe576d]
[msspc12:10573] [10] liggghts() [0x567bc9]
[msspc12:10573] *** End of error message ***
Segmentation fault (core dumped)

How can I solve the problem?
I attach my script here.
Thanks in advance for your advice.