note 21173 added to ref.shmop

Your segment probobly doesn't exist. You should probobly be using the c flag... "a" for access (sets SHM_RDONLY for shmat) use this flag when you need to open an existing shared memory segment for read only "c" for create (sets IPC_CREATE) use this flag when you need to create a new shared memory segment or if a segment with the same key exists, try to open it for read and write -- http://www.php.net/manual/en/ref.shmop.php http://master.php.net/manage/user-notes.php?action=edit+21173 http://master.php.net/manage/user-notes.php?action=delete+21173 http://master.php.net/manage/user-notes.php?action=reject+21173