Hi all, I have some problems using the shared_memory_object constructor with the create_only parameter. The goal is to allow only one process to write to the shared memory. So I create a shared_memory_object with the create_only parameter. For the first process this is successful (as I assumed), but for the second process (same parameters) this is successful, too (not as I assumed). The documentation of boost says that it should throw an exception, if the shared memory is allready created. Is this a bug or a misuse or understanding of the library? I am using WinXP, boost 1.41 and MinGW 5.1.6. Probably this is a problem concerning the special handling of the shared memory using Windows? I realized another problem. If I call the static function shared_memory_object::remove(const char* name), the memory should be removed only when no further process has access to the memory. This seems also not to work. I did the following: 1. create shared memory for writing. 2. open shared memory for reading 3. shared_memory_object::remove(const char* name) (from the reading process) 4. reopen the shared memory for reading -> exception: can not find the file Any suggestions to my issues? Thanks in advance Philipp