URGENT! What is wrong with this code?

I am doing a project and the following is one part of my code.

#include <stdio.h>
#include <stdlib.h>

#define NO_VOTERS 2977
#define NO_MOVIES 1627

struct Person {
  short id;
/*  char zipcode[6];  */
  short age;
  char gender;
};

struct Movie {
/*  char theatre_status[8];
  char video_status[8]; */
  short id;
  short action;
  short animation;
  short art_foreign;
  short classic;
  short comedy;
  short drama;
  short family;
  short horror;
  short romance;
  short thriller;
};

struct Vote {
  short person_id;
  short movie_id[NO_MOVIES];
  float score[NO_MOVIES];
};

int main(int argc, char** argv) {
  FILE *infile1, *infile2, *infile3, *outfile;
  struct Person voter[NO_VOTERS];
  struct Movie movie[NO_MOVIES];
  struct Vote vote[NO_VOTERS];
  short last_read_person_id, person_id, movie_id;
  float score;
  short notfound;
  short movietype[10];

  int i, j, k, m;
  float t;

  fprintf(stderr, "Opening file...\n");
  if ((infile1=fopen("person_simplified.txt", "r"))==NULL) {
    fprintf(stderr, "Error opening file: person_simplified.txt\n");
    exit(-1);
  }  if ((infile2=fopen("movie_simplified.txt", "r"))==NULL) {
    fprintf(stderr, "Error opening file: movie.txt\n");
    exit(-1);
  }
  if ((infile3=fopen("vote1_simplified.txt", "r"))==NULL) {
    fprintf(stderr, "Error opening file: vote1.txt\n");
    exit(-1);
  }
  if ((outfile=fopen("vote.nominal.arff", "w"))==NULL) {
    fprintf(stderr, "Error opening file: vote1.txt\n");
    exit(-1);
  }
  fprintf(stdout, "Initialization...\n");
  for (i=0; i<NO_VOTERS; i++) {
    for (j=0; j<NO_MOVIES; j++) {
      vote[i].movie_id[j]=-1;
      vote[i].score[j]=-1;
    }
  }

  return 0;
}

I am getting "Segmentation fault" when getting into the for loop. Can someone helps me?