Out of memory error during Atena analysis

If you can not make your model smaller (e.g., by making use of symmetry or a coarser mesh etc.), you can switch from the standard direct band matrix solver to one of the sparse iterative solvers (ICCG or DCG), which have considerably lower memory requirements. See section "3.8.1.1 Analysis information" in the ATENA 3D Users Manual for details.