Intel MKL FFT for forward and backward Fourier transform of 2D data

Hello,

I am trying to do forward and backward Fourier transform using the FFT routines available in Intel MKL. I have taken help of manual and also website examples to do this but i am getting a segmentation fault. Please help me to resolve it. 

I am taking real valued as input to FFT forward and want output in Complex form.

Following is my code which i have implemented so far

#include <iostream>

#include "mkl_dfti.h"

typedef struct {
    float re;
    float im;
} mkl_float_complex;

using namespace std;

int main(int argc, char **argv)
{

//Read binary file in array xr_in dimension 2001 X 1911

n2=2001 n1=1911

    mkl_float_complex **xc_out;
    DFTI_DESCRIPTOR_HANDLE desc_handle_for, desc_handle_back;
    MKL_LONG status;
    MKL_LONG lengths[2];

    lengths[0] = n2;      lengths[1] = n1;
    xc_out = (mkl_float_complex**) malloc(sizeof(mkl_float_complex*)*n2);
    for(i2 = 0; i2 < n2; i2++)
        xc_out[i2] = (mkl_float_complex*) malloc(sizeof(mkl_float_complex)*n1);

    status = DftiCreateDescriptor(&desc_handle_for, DFTI_SINGLE, DFTI_REAL, 2, lengths);

    status = DftiSetValue(desc_handle_for, DFTI_CONJUGATE_EVEN_STORAGE, DFTI_COMPLEX_COMPLEX);

    status = DftiSetValue(desc_handle_for, DFTI_PACKED_FORMAT,          DFTI_CCE_FORMAT);

    status = DftiSetValue(desc_handle_for, DFTI_PLACEMENT,              DFTI_NOT_INPLACE);

    status = DftiCommitDescriptor(desc_handle_for);

    status = DftiComputeForward(desc_handle_for, xr_in, xc_out);

    status = DftiFreeDescriptor(&desc_handle_for);

     //Writing real part only to file

    //Open file

    for(i2 = 0; i2 < n2; i2++)
        for(i1 = 0; i1 < n1; i1++)
            fwrite(&(xc_out[i2][i1].re), sizeof(float), 1, fp);

   //Close file

}//End of main