https://communities.bentley.com/products/ram-staad/f/ram-staad-forum/159239/grouping-of-analytical-members-for-structure-with-physical-model-staad-connectFor structures with Physical Models, any addition or modification to the Physical model seem to cause the Analytical members to RE-NUMBER. This causes the Groupings (using Analytical Member numbers) to REQUIRE REGROUPING. This is acceptable for simpleen-USTelligent Community 12