Lost Pointer when adding GTK+ to an application

["Diego Rivera" <rive17 gmail com>]

Hi! I am not exactly new to GTK+, however I have come across a problem
i have no explanation for, and I'll be glad if someone could point me
towards a possible solution.

I am currently developing an
application that uses various algorithms for sequence alignment in
biological applications (DNA, RNA, Proteins and so on). This
application is mainly for scientific purposes.

The core algorithms are already running fine as a console
application in a very stable version. I am working in adding some
graphical interface to the program using GTK+. So, I built a little
Window that asks for the different parameters and makes a call to the
already defined functions in the console application, which are indeed
stable. However, when making the call to the algorithm with GTK+
running, some of the pointers in my data structures get lost, and I
just get a Segmentation Fault.

While trying to debug this weird behavior, I have narrowed the problem to the fact of having a window running. 

Right
now, I just have a main that creates a GtkWindow with a GtkButton, and
the callback of the button calls the stable routine of the console
application using some "hard-wired" parameters. I have made tests and
the console application gives the correct answer for those parameters.
However, when calling the routine from the callback, Segmentation Fault
is the only result I have been able to get.

I have tried with different versions of GTK+ and the outcome is persistent.

The data structure of the console application looks something like this:

typedef struct{
    int length;
    char* seq;


}sequence_t;

typedef struct{
    int n;
    int m;
    int** table;
}table_t;

typedef struct{
    sequence_t* vp;
    sequence_t* wp;
    table_t* table;
    int scoring;
    int result;


}alignment_t;

Using gdb i have found that the Segmentation Fault occurs at some point when accesing the table from the alignment.

I
believe i have made no memory errors in my console application, since
it runs ok every time. However, i haven't seen the correct output from
my GTK application.

Is there any hint that you could give me in order to correct the error?

Thanks
- Diego Rivera -