Hi Coleman, On 27.05.2010 15:43, Coleman Brumley wrote: > char buff[1500]; //on the heap > n=NutUdpReceiveFrom(s,&fromaddr,&fromport,&buff,sizeof(buff),1); Try n=NutUdpReceiveFrom(s,&fromaddr,&fromport,buff,sizeof(buff),1); (without address modifier for the buff pointer) Harald