http://software.intel.com/en-us/articles/intel-fortran-compiler-increased-stack-usage-of-80-or-higher-compilers-causes-segmentation-fault en-us the "ulimit -s unlimited" bash option was clearly the best choice for the program I am using, rather than "ifort ... -heap-arrays". I don't know why but it is between 10 and 100 times quicker with ulimit -s unlimited than with -heap-arrays. Thanks for the solution ]]> http://software.intel.com/en-us/articles/intel-fortran-compiler-increased-stack-usage-of-80-or-higher-compilers-causes-segmentation-fault/#comment-47153 Mon, 09 Aug 2010 10:47:52 -0700 http://software.intel.com/en-us/articles/intel-fortran-compiler-increased-stack-usage-of-80-or-higher-compilers-causes-segmentation-fault/#comment-47153 http://software.intel.com/en-us/articles/intel-fortran-compiler-increased-stack-usage-of-80-or-higher-compilers-causes-segmentation-fault/#comment-53677 Fri, 17 Dec 2010 09:14:56 -0800 http://software.intel.com/en-us/articles/intel-fortran-compiler-increased-stack-usage-of-80-or-higher-compilers-causes-segmentation-fault/#comment-53677 http://software.intel.com/en-us/articles/intel-fortran-compiler-increased-stack-usage-of-80-or-higher-compilers-causes-segmentation-fault/#comment-54896 Fri, 14 Jan 2011 13:38:11 -0800 http://software.intel.com/en-us/articles/intel-fortran-compiler-increased-stack-usage-of-80-or-higher-compilers-causes-segmentation-fault/#comment-54896 http://software.intel.com/en-us/articles/intel-fortran-compiler-increased-stack-usage-of-80-or-higher-compilers-causes-segmentation-fault/#comment-66326 Sat, 05 Nov 2011 05:31:33 -0700 http://software.intel.com/en-us/articles/intel-fortran-compiler-increased-stack-usage-of-80-or-higher-compilers-causes-segmentation-fault/#comment-66326 http://software.intel.com/en-us/articles/intel-fortran-compiler-increased-stack-usage-of-80-or-higher-compilers-causes-segmentation-fault/#comment-67317 Fri, 25 Nov 2011 00:38:52 -0800 http://software.intel.com/en-us/articles/intel-fortran-compiler-increased-stack-usage-of-80-or-higher-compilers-causes-segmentation-fault/#comment-67317 http://software.intel.com/en-us/articles/intel-fortran-compiler-increased-stack-usage-of-80-or-higher-compilers-causes-segmentation-fault/#comment-67535 Mon, 28 Nov 2011 09:47:35 -0800 http://software.intel.com/en-us/articles/intel-fortran-compiler-increased-stack-usage-of-80-or-higher-compilers-causes-segmentation-fault/#comment-67535 http://software.intel.com/en-us/articles/intel-fortran-compiler-increased-stack-usage-of-80-or-higher-compilers-causes-segmentation-fault/#comment-71448 Mon, 12 Mar 2012 12:23:55 -0700 http://software.intel.com/en-us/articles/intel-fortran-compiler-increased-stack-usage-of-80-or-higher-compilers-causes-segmentation-fault/#comment-71448