Joining multicast group in lwip for receiver

I am not able to join the multicast group using igmp_joingroup function which is present in the Lwip stack.
And when i am including the file igmp.c in my code my module stops pinging.The igmp_joingroup function is present inside this igmp.c file.

Thanks for your help

This question is very specific to LWIP and not FreeRTOS. I’d recommend asking on LWIP mailing list as you are likely to get better response there.

Okay . Thanks for your response