Hello everyone, Is anyone out there using AF_UNIX (not AF_INET) Sockets? I am having problems using the AF_UNIX Sockets to send more than 4096 bytes of data. I have been told (by HP Response) that there is a limit at 4K, but I can use the setsockopt() routine to increase this limit. I have done this, and even checked the SO_RCVBUF & SO_SNDBUF with getsockopt(), but it still fails, with the exact same errno as before (218). If anyone out there could provided me with more information, I would certainly appreciate it. More information... I am using X.50.50, C, and the POSIX development kit BTW - if you try this on a 50.40 system the errno will be 1026 which is an undefined errno [that is what started all this...] Thanks in advance, John Brainard -- John Brainard [log in to unmask]