IN NUCLEO-144H743 , only 3 ADC channels working in ADC 1

[Bj.1]

IN NUCLEO-144H743 , only 3 ADC channels IN3 ,IN18 ,IN19 working in ADC 1

If I use INP5 or INP6, I am not reading anything, 

I am using Example ADC_RegularConversion_Polling  replacing sConfig.Channel with ADC_CHANNEL_5 and 6; 

Am I missing any Configuration?

[TDK]

> If I use INP5 or INP6, I am not reading anything,

What does this mean? Presumably there is a value making it to the ADCx->DR register. Is it incorrect? Too high, low?

> Am I missing any Configuration?

Maybe. You haven't given us much to work with. You'll need to initialize all ADC pins in use in analog mode.

[Bj.1]

Hi
I have attached the code which i am trying .
Thanks
Balaji J