C :: 3D Array Of Pointers To Linked Lists

I am having some trouble getting a 3d array of pointers to link up with a linked list for each of the array elements. the 3d array of pointers is declared like this:

Code:

struct particle *cell[MAXCELLS][MAXCELLS][MAXCELLS]; and there are linked lists declared like this:
Code: struct particle { /* structure for particles */
double sw[3]; /* square well components */
double hs[3]; /* hard sphere components */
double u[3]; /* unit vector for rotations */
struct particle *link;
};

I want to get the array pointers 'cell[x][y][z]' to point to the first observed particle in a function next to main, something like this:

Code:

void generate_list(){
int i,j,k,l;
/* determine the number of cells to decompose the simulation box in each of x, y and z directions*/
int(cells_x) = floor(boxX/cell_size);
int(cells_y) = floor(boxY/cell_size);
int(cells_z) = floor(boxZ/cell_size);
/* initialise the array of pointers to NULL */
for (j=0;j<cells_x;j++){

[Code]...

I am getting a pointer type cast error when I compile "assignment from incompatible pointer type",