Hi, I found a problem that seems to be an issue in boost.interprocess (1.41): I was using managed_shared_memory (not managed_windows_shared_memory) and all was going fine until the day I run my applications on a virtual machine. The problem is that some applications were randomly not able to attach the shm previously created and the error was: "The system cannot find the file specified". I found that in fact the folder (under ...All Users\Application Data\boost_interprocess) where the shm file was being looked for was not the same as the folder where it was created. Is it possible that the algorithm used to build the name of the folder "thinks" for some reason that there was a system restart ? Cheers, Rui