I would have thought that it was only the patching software that was platform specific. Surely the final result is Xy4 for DOS v 4.018 running under whatever? Or am I hopelessly offbase?As I understand it, TTG has issued Y2K patches for XY4 DOS running under Win 3.1, Win 9X and NT, but not for XY4 DOS running under DOS (I expect because of date issues in most older versions of DOS). Will any of these "work" for XY4 DOS running in a VDM under OS/2? Tom Hawley New York tjh@xxxxxxxx