Hello, The maintainer of the MacOS X version of Modeller 6.0 may want to consider installing fink 0.6.2 (from fink.sourceforge.net) and 'fink install' the gcc 3.4 g77 compiler to do the next build of Modeller 6.0 under Panther. While the gcc 3.4 g77 compiler isn't as agressive in optimization as the IBM XL Fortran for MacOS X compiler, it does a much better job than before (if used at -O3). This now enables the DFA ppc support in the compiler. I just mention this because the Absoft build of modeller seems a bit sluggish. Unless you have the very latest Absoft MacOSX compilers they might not even generate code as fast as the g77 from gcc 3.4. Otherwise perhaps you need a much higher optimization level setting with the Absoft compiler than you are currently using. Jack Howarth ps If you use g77 3.4 and find that you get compilation error at -O3 you might selectively add -fno-globals to those specific files. The use of -fno-globals on all the source files will impact the performance of the generated code because it disables higher order optimizations. So that should be avoided. ------------------------------------------------------------------------------ Jack W. Howarth, Ph.D. 231 Albert Sabin Way NMR Facility Director Cincinnati, Ohio 45267-0524 Dept. of Molecular Genetics phone: (513) 558-4420 Univ. of Cincinnati College of Medicine fax: (513) 558-8474