MCU not stopping at sleepmode in freertos

[HZaib.1]

I am using stm32l496 

I am trying to enter sleepmode in freertos, but for some reason the system does not enter it. 

GLOBAL void SleepMode_Activate(void) {


	unsigned int sleep;
		  flag  = 1;
	/*Disable display task if not already disabled*/
	if (mt_TaskStatus(_TN_ANZ) != _SLEEPING) {
		mt_Terminate(_TN_ANZ);	//Disabled Display
	}

	/*Turn off lcd and other stuff*/
	vw_SlowHwAus();
	/*disables COMs if necessary*/
	/*Enable there alternate wakeup pins of COM*/
	vw_ComBeenden();
	slowspeed_timers = 1;
	/*Enable interrupt on buttons, before they were working in timer*/
	tas_Starten();
	mt_TimerDis();
	osThreadTerminate(Tasks_ID[_TN_KZR]);
	SleepMode_DisableUart();


    hw_SetSpeedSlow();
	HAL_SuspendTick();
	  SysTick->CTRL &= ~SysTick_CTRL_TICKINT_Msk;



		 HAL_PWR_EnterSLEEPMode(PWR_LOWPOWERREGULATOR_ON, PWR_SLEEPENTRY_WFI);

	//************** Slow Section Start
	do {
		hw_Wdr();

	//	bib_Nop025us();
		// because of Instruction Que
		if (bSekNeu)		    // meanwhile a change of seconds takes place ?
		{
			bSekNeu = 0;
			vw_TestNetzSlow();	// Check supply
		}
	} while (bBedienReq == 0 && bUmwReq == 0// bMinNew == 0 is included in bUmwReq
	&& SioReq == 0 && MeldReq == 0);// as long as no key, no min, no SIO, no message
	//************** Slow End section



   //__HAL_FLASH_SLEEP_POWERDOWN_DISABLE();
   /* System is Low Power Run mode when exiting Low Power Sleep mode,
       disable low power run mode and reset the clock to initialization configuration */
    HAL_PWREx_DisableLowPowerRunMode();

   hw_SetSpeedFast();

   /* Resume Tick interrupt if disabled prior to Low Power Sleep mode entry */
   HAL_ResumeTick();
   SysTick->CTRL  |= SysTick_CTRL_TICKINT_Msk;
	slowspeed_timers = 0;
	mt_TimerEn();
	uhr_LiesRtc();			// Complete time
	vw_ComReact();			// V2.0

	//osKernelRestoreLock(lock)


}

I also disabled systick and  my base timer. I made sure no interrupts are being generated, but still I cant go into sleepmode. I think this is some kind of a bug. I am not using tickless idle right now for some reasons. 

[Sarra.S]

Hello @HZaib.1, sorry for the delayed answer, 

Your code seems ok, use a debugger to step through the code and check if the HAL_PWR_EnterSLEEPMode() is being called and check the status of the power control flags after attempting to enter sleep mode