How to free multidimensional arrays

[Terrylee]

Hi there,

I have created a 3D array A representing 100 4x3 matrices of doubles:

        ui xdim = 100;
	ui ydim = 4;
	ui zdim = 3;

	double ***A = (double ***)malloc(xdim * sizeof(double **));
	for(ui i = 0; i < xdim; i++) {
		A[i] = (double **)malloc(ydim * sizeof(double *));
		for(ui j = 0; j < ydim; j++)
			A[i][j] = (double *)malloc(zdim * sizeof(double));
	}

Somehow I can't figure out how to free it up. I tried this code:

	for(ui i = 0; i < xdim; i++){
		for(ui j = 0; j < ydim; j++)
			free((void **)A[i][j]);
		free((void *)A[i]);
	}
	free((void *)A);

But get this error message while running:

Windows has triggered a breakpoint.
This may be due to a corruption of the heap....

Any idea of what could go wrong with the code to free the memory?

Thanks

[Duthomhas]

Line 3 should read:

			free((void *)A[i][j]);

Let me know if that doesn't help.

[Terrylee]

Thanks Duoas,

Just tried it and got the same error message. This line triggers the error obviously.

[Terrylee]

All right!

Duoas, what you suggested is correct; it works fine. The error was triggered by me using a commercial library (Optivec) which requires some special data alignment to function.