Hi Clarke, I have no access to that platform, so it's difficult to know what's happening. Code should compile in gcc >= 3.4 and vc >= 7.1. However, it might be possible that defining segment_manager<...> as segment manager is not well received by Sun compiler. Can you try to change that line with typedef segment_manager<CharType, MemoryAlgorithm, IndexType> segment_manager_t; So will need to change also lines that refer to that typedef in the classes taking that index_config class (flat_map_index, I suspect) to make it compile. Let me know if you can try to guess that way. Apart from that, I would prefer if you start working with Interprocess instead of Shmem, because Shmem library is in standby mode and Interproces is going to be the official boost library. I would like to concentrate my efforts there and I think that you would prefer using the official library. You have an snapshot here: http://www.boost-consulting.com/vault/index.php?directory=Concurrent%20Progr... The latest version is in the Boost CVS. Anyway, I suspect that you will find a similar problem in Interprocess, so please let me know if that's the case. Regards, Ion