Error-Segmentation fault - invalid memory reference.

Please select the most relevant MFiX category: | Installation | How to | Bug report | Share | for this topic.I am running a DEM model and when I get the following error, it runs for 1.4 seconds. Who can tell me what this means and how can I fix it ? Thank you

Program received signal SIGsEGv: Segmentation fault - invalid memory reference.
Backtrace for this error:
#0 remove_collision
at des/calc collision wall mod.f:787
#1 calc_collision_wall_MoD_calc_dem_force_with_wall_stl._omp_fn.0
at des/calc collision wall mod.f:289
#2 GOMP_parallel
at…7…/…/libgomp/parallel.c:178
#3 calc_collision_wall_MoD_calc_dem_force_with_wall_stl
at des/calc collision wall mod.f:157
#4 calc_force_dem_mod_MoD_calc_force_dem
at des/calc force dem.f:111
#5 des_time_march_MoD_des_time_step
at des/des time march.f:211
#6 run_dem
at mfix.f:214
#7 run_mfix
at mfix.f:149
#8 main_MOD_run_mfix0
at main.f:85

Please submit a full bug report (Main menu/Submit bug report) so we can investigate this failure.

ok,I 've sent the bug

After clicking submit bug report you need to upload the ZIP file here. We do not have auto-upload. Thanks!