NaN found in stiffness matrix element. [Error code: 36]https://communities.bentley.com/products/geotech-analysis/f/forum/212911/nan-found-in-stiffness-matrix-element-error-code-36I am getting this message in my 5th calculation phase. the phase was running OK before i did some changes in the model. No clue about the error or problem area.en-USTelligent Community 12RE: NaN found in stiffness matrix element. [Error code: 36]https://communities.bentley.com/thread/645998?ContentTypeID=1Wed, 21 Apr 2021 19:26:40 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:39c60124-c866-4f6f-bc80-56863fadb485Rushan Gizzatullin<p>Dear&nbsp;<strong>Sharique,</strong></p> <p>According to Reference manual, Appendix J:</p> <p><img alt=" " src="/resized-image/__size/320x240/__key/communityserver-discussions-components-files/343671/pastedimage1619032980143v1.png" /></p> <p>First of all, I recommend looking at those elements that first appeared in Phase 4 (geometry and properties of these elements).</p> <p><span>If it does not help I suggest you submit a service request.&nbsp;<br />One of PLAXIS support engineers can help you in detail:</span></p> <p><a href="https://apps.bentley.com/srmanager/ProductSupport">https://apps.bentley.com/srmanager/ProductSupport</a></p><div style="clear:both;"></div>