Hi again, I now have ported two more packages - Xtreams-Transforms - Xtreams-Substreams and their tests I did not have any portability problem with those... But that's because I did not handle the Character encoder/decoder. Consequently, I have 8 tests failing (the Base64 related tests) Plus 4 other tests failing because of my poor implementation of #after:do: (forking processes in a SUnit TestCase can't be that obvious). Now, the easy part of the port (copy/paste) is almost ended. Once we manage a compatible way to handle pragmas, PEG Parser should port quite easily too. Then, the harder work begins: - File/Socket/Pipe - Pointers (in External Heap) - Character encoding/decoding - Compression/Decompression If you think you can help in any of these, please tell. Nicolas