stm32h743 SDcard IAP application can't copy bin file to the flash

[tehniksit]

It stops at comparing values written into the flash. At the begginig some data are copying well, but then it doesn't match and return FLASHIF_WRITINGCTRL_ERROR. It always stops at the same position, but when I change size of stack it becomes different.

if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_FLASHWORD, FlashAddress, ((uint32_t)(Data+i))) == HAL_OK)
    {
     /* Check the written value */
      if (*(uint32_t*)FlashAddress != *(uint32_t*)(Data+i))
      {
        /* Flash content doesn't match SRAM content */
        return(FLASHIF_WRITINGCTRL_ERROR);
      }
      /* Increment FLASH destination address */
      FlashAddress += 32;
    }