`Build Error` Error -1073741819 - C

my assignment is to take in a data file of all the possible letters for each die from the game Boggle. Here's a copy of the data file:

   D R L X E I
   C P O H S A
   N H N L Z R
   W T O O T A
   I O S S E T 
   N W E G H E
   B O O J A B
   U I E N E S
   P S A F K F
   I U N H M Qu
   Y R D V E L
   V E H W H R
   I O T M U C
   T Y E L T R
   S T I T Y D
   A G A E E N

Each die takes 6 of the letters, and these are stored in a linked list. When I have tried to run the following code, I keep getting an error code: C:\Dev-Cpp\Makefile.win [Build Error] [Untitled1.o] Error -1073741819

I've tried using 3 different IDEs, but always seem to get some compiling issue. I can't seem to figure out where I'm going wrong! This isn't complete yet by any means but would rather figure this out before I keep going deeper and deeper. Thanks in advance!

code:

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


#define LENGTH 80

struct boggleDataNode{
       char data[3];
       struct boggleDataNode *nextData;
}*head;

struct boggleDieSideNode{
       char dieSideData[3];
       struct boggleDieSideNode *nextSide;
}*head1;

void readData(struct boggleDataNode temp);

int main(){
    int counter = 0;
    struct boggleDataNode *head;
    struct boggleDieSideNode *head1;
    struct boggleDataNode *temp;
    *head = NULL;
    *head1 = NULL;
    *temp = *head;
    readData(*temp);


    system("pause");
    return 0;
}
void readData(struct boggleDataNode temp){
    //initializing variables including
    //opening the input file
    FILE *input = fopen("BoggleData.txt","r");
    int name =0; 
    int id=0;
    char data[96] ={};

    //error checking that the file opened
    if (input == NULL){
        fprintf(stderr, "Can't open input file!\n");
        exit(1);
    }
    while( fscanf(input, "%s", &data) != EOF)
           printf("%s", data);

}

Solution

In your code, change

struct boggleDataNode{
       char data[3];
       struct boggleDataNode *nextData;
}*head;

struct boggleDataNode{
       char data[3];
       struct boggleDataNode *nextData;
};

as it seems you don't need a global pointer for that structure anyway. As per your usage, it will be shadowed by the local head.

Same goes for head1 also.

Next, you assign NULL to a pointer itself, not to the variable it points to. (FWIW, NULL itself is a pointer, an invalid one, though).

Change

*head = NULL;

head = NULL;