I can not use mpi to run my model

[liuzuyuan]

Dear seniors:
I installed MPICH .When I calculated 1440000 girds in Horizontal uniform layered model ,my computer has 16GB of memory. My nproc is seted as 4.But I meet this question as follows.
PostScript file written

Creating color image of size 9610 x 2524 for time step 5
drawing scalar image of the forward wavefield displacement...

Program received signal SIGSEGV: Segmentation fault - invalid memory reference.

Backtrace for this error:
#0 0x1525e0423960 in ???
#1 0x1525e0422ac5 in ???
#2 0x1525e004251f in ???
at ./signal/../sysdeps/unix/sysv/linux/x86_64/libc_sigaction.c:0
#3 0x6368827bb20c in write_color_image_snaphot_
at src/specfem2D/write_color_image_snaphot.F90:325
#4 0x6368827b5491 in write_movie_output_
at src/specfem2D/write_movie_output.f90:155
#5 0x6368826c416a in iterate_time_
at src/specfem2D/iterate_time.F90:394
#6 0x636882634166 in specfem2d
at src/specfem2D/specfem2D.F90:411
#7 0x636882634166 in main
at src/specfem2D/specfem2D.F90:379

===================================================================================
= BAD TERMINATION OF ONE OF YOUR APPLICATION PROCESSES
= PID 66225 RUNNING AT yuan-HBB-WX9
= EXIT CODE: 139
= CLEANING UP REMAINING PROCESSES
= YOU CAN IGNORE THE BELOW CLEANUP MESSAGES

YOUR APPLICATION TERMINATED WITH THE EXIT STRING: Segmentation fault (signal 11)
This typically refers to a problem with your application.
Please see the FAQ page for debugging suggestions

Thank you very much for your time and assistance. I greatly appreciate any insights you can provide.