LWIP Debug Messages Not Working

[lavanya]

I Enabled LWIP DEBUG options in CUBEMX

in lwipopt.h 

/* USER CODE BEGIN 1 */

#define LWIP_DEBUG 1

/* USER CODE END 1 */

in main.c 

int __io_putchar(int ch)
{
 ITM_SendChar(ch);
 return ch;
}

 But I am not getting anything in SWVITM Data Console