Dimesio, Thanks for that - restricting to win32 solved the problem - I hadn't realised that wine now comes with 64-bit capability. However, the Mathematica installer automatically detects whether it is running under 32-bit or 64-bit Windows, and installs the right binaries as appropriate, so does my original problem indicate that something is wrong with the 64-bit part of wine? Martin: Mathematica comes bundled with its own Java, which is usually outdated by the time Mathematica ships. Thanks again to both of you, David