Error1:Program received signal SIGSEGV: Segmentation fault - invalid memory reference

I have been working on a model for several months, and now when I run my model, I have the following error:
Program received signal SIGSEGV: Segmentation fault - invalid memory reference.

Backtrace for this error:
#0 0x7f11bcb4932a
#1 0x7f11bcb48503
#2 0x7f11bc1c5fcf
#3 0x55d8e7a67992
#4 0x55d8e7a737b0
#5 0x55d8e7a74be6
#6 0x7f11bc1a8b96
#7 0x55d8e7a21859
#8 0xffffffffffffffff
Segmentation fault (core dumped)

Here is my model :
I really need help, and I appreciate your help.

What system are you running on? (.rar is not a normal Linux file-type – Windows?)
What compiler(s) are you using?
Have you tried to compile a trace-back/check-everythng executable and run that? That would have given a meaningful backtrace, with source files and line numbers, from which we might be able to help.

I am running on Ubuntu 18.04, and also using gfortran as a compiler. Unfortunately, I haven’t tried to compile trace-back, and I don’t know what it is.

Look at the compile-flags in the I/O API’s ioapi/Makeinclude.Linux2_x86_64gfortdbg