HP removed X server support on the 800 series beginning in v9.0, and Xremote assumes the directory /usr/spool/sockets/X11 is present. To make HP800/Xremote and HP800/xinitremote binaries work on HP-UX v9.x, create /usr/spool/sockets/X11 directory. Make sure the permissions on /usr/spool/sockets/X11 directory is 777, since the Xremote helper tries to write something in there.