Hi @mayowaQ2ABG
It looks like the ends of some of the beams are not connected together. Inventor normally detects when lines intersect and automatically joins the beams, but sometimes it does not detect the intersection. According to this article, you can try a smaller mesh size. If that does not fix it, you can split the sketch lines where the beams should intersect but the beams are not connected. See Beam elements not connected together in Inventor Nastran analysis
John
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 😉
