FDICopy Results in crashing with no error logs

Question

I finished implementing the CAB compression file, now I'm implementing the decompression but everytime I call the FDICopy or FDIIsCabinet my app crashed so I thought it might be because of the way I implemented the FDICreate callbacks, but still can't find any solution to it

Here's the extract function

    FDICABINETINFO  fdici;
    int             hf;
    char            *p;

    // Set up some important globals
    g_hfdi = NULL;
    g_pFDIProgress = NULL;

    g_hfdi = FDICreate(
        fdi_mem_alloc,
        fdi_mem_free,
        fdi_file_open,
        fdi_file_read,
        fdi_file_write,
        fdi_file_close,
        fdi_file_seek,
        cpu80386,
        &g_fdi_erf
    );

    if (g_hfdi == NULL)
    {
        return FALSE;
    }

    hf = fdi_file_open(
        cCABFullPath,
        _O_BINARY | _O_RDONLY | _O_SEQUENTIAL,
        0
    );

    if (hf == -1)
    {
        return FALSE;
    }

    if ( g_hfdi != NULL) {

        if (FALSE == FDICopy(
            g_hfdi,
            "INSTALL.cab",
            "C:\\xx\\xx\\",
            0,
            notification_function,
            NULL,
            NULL))  // NULL or DEST Folder? 
        {
                PRINTF(
                    "FDICOPY() FAILED: CODE %D [%S]\N",
                      g_fdi_erf.ERFOPER
                );

            return FALSE;
        }
    }

    if (FALSE == FDIIsCabinet(
            g_hfdi,
            hf,
            &fdici))
    {
        /*
         * No, it's not a cabinet!
         */
        _close(hf);
        PRINTF(
                    "FDICOPY() FAILED: CODE %D [%S]\N",
                      g_fdi_erf.ERFOPER
                );
        return FALSE;
    }

And these are the related callbacks used by the FDICreate

FNALLOC(fdi_mem_alloc)
{
    return malloc(cb);
}

/*
 * Memory free function
 */
FNFREE(fdi_mem_free)
{   
    free(memory);
}

FNOPEN(fdi_file_open)
{
#if _MSC_VER >= 1500
    int fh;
    return _sopen_s(&fh, pszFile, oflag, _SH_DENYNO, pmode);
#else
    return _open(pszFile, oflag, pmode);
#endif
}


FNREAD(fdi_file_read)
{
    return _read(hf, pv, cb);
}


FNWRITE(fdi_file_write)
{
    return _write(hf, pv, cb);
}


FNCLOSE(fdi_file_close)
{
    return _close(hf);
}


FNSEEK(fdi_file_seek)
{
    return _lseek(hf, dist, seektype);
}

I didn't put the notification_function callback as well since it's a really long one

By debugging it I can just see the g_hfdi actually receives an address and hf = 0, but once it reaches the FDICopy function it just crashes without letting me even check the error, and if i move the piece of code FDIIsCabinet above the previous it just returns false without letting me check anything again..