Hello, I am a new user of the Boost Libraries. Currently, I tried the Boost.Interprocess source library with an example program which creates a shared memory segment and writes a vector into the shared memory. A receiver process attaches to the named shared memory segment and outputs the vector. This all works has advertized. The one issue is that whenever I try to list the shared memory segment via the ipcs -m command I do not see the shared memory created from the sender program. This is the code snippet which creates the shared memory: #include ...managed_shared_memory segment (create_only ,"MySharedMemory" //segment name ,65536); //segment size in bytes ... Note: The sender program is running for 5 minutes before terminating and removing the shared memory. The binaries were built with g++ version 3.4.6 20060404 (Red Hat 3.4.6-8) RedHat Linux 5: Kernal Version : uname -a Linux xxx 2.6.9-67.ELsmp #1 SMP Wed Nov 7 13:56:44 EST 2007 x86_64 x86_64 x86_64 GNU/Linux Best Regards, Leo -- Be Yourself @ mail.com! Choose From 200+ Email Addresses Get a Free Account at www.mail.com