Hi Makarand, If upgrading from Windows 98 is not an option, you might be able to run Athena without the "runner" program, which acts as a wrapper around the Ifeffit programs. The best way to do this would be to have a ".bat" file that ran the correct program for you. For instance, you could write this as the file "run_athena.bat": @echo off SET IFEFFIT_DIR="C:\Program Files\Ifeffit\" SET IFEFFIT_BIN=%IFEFFIT_DIR%\bin SET PATH=%PATH%;%IFEFFIT_BIN% SET PGPLOT_DIR=%IFEFFIT_BIN% SET PGPLOT_DEV=/GW %IFEFFIT_BIN%\athena.exe , This will work around the need for the "runner" program, but I can't guarantee that this will work. At this point, I would be surprised if athena/ifeffit ran well on most Windows98 machines, but it might work. --Matt