Hi Nigel,
The problem with the overlapping beam element numbers exist when the 3-D visualization is on. When off, the element number appears only at the center of the beam. (The visualization can be turned off by right-clicking on the part in the browser and unchecking "3-D Visualization".)
I will make sure that our developers are aware of this issue.
John Holtz
Product Design Engineer, Algor Simulation
Autodesk, Inc.
John Holtz, P.E. Global Product Support
Autodesk, Inc. If not provided already, be sure to indicate the version of Inventor Nastran you are using!"The knowledge you seek is at knowledge.autodesk.com" - Confucius 😉