https://community.graphisoft.com/t5/Modeling/SEO-Problem/m-p/234405#M125411 For the record, I deleted the conical element, created a new (identical) one, and the problem was gone. AC glitch. Fri, 21 Jun 2019 22:08:34 GMT Dave Jochum 2019-06-21T22:08:34Z https://community.graphisoft.com/t5/Modeling/SEO-Problem/m-p/234402#M125408 <DIV class="actalk-migrated-content"><T>I'm using a conoid element to subtract with downward extrusion on a slab. It's worked many times in this model (smaller ones to left of image), but not the larger one in the center. All slabs are on the same layer, all conoids on their own layer. Renovation filters not an issue. Baffled.</T></DIV> Wed, 24 May 2023 17:56:25 GMT https://community.graphisoft.com/t5/Modeling/SEO-Problem/m-p/234402#M125408 Dave Jochum 2023-05-24T17:56:25Z https://community.graphisoft.com/t5/Modeling/SEO-Problem/m-p/234403#M125409 Any chance that there are 2 slabs in the same place?<BR /> <BR /> Barry. Thu, 20 Jun 2019 06:16:43 GMT https://community.graphisoft.com/t5/Modeling/SEO-Problem/m-p/234403#M125409 Barry Kelly 2019-06-20T06:16:43Z https://community.graphisoft.com/t5/Modeling/SEO-Problem/m-p/234404#M125410 <BLOCKQUOTE>Barry wrote:<BR /> Any chance that there are 2 slabs in the same place?<BR /> <BR /> Barry. </BLOCKQUOTE> Good thought, but no. Thu, 20 Jun 2019 07:14:34 GMT https://community.graphisoft.com/t5/Modeling/SEO-Problem/m-p/234404#M125410 Dave Jochum 2019-06-20T07:14:34Z https://community.graphisoft.com/t5/Modeling/SEO-Problem/m-p/234405#M125411 For the record, I deleted the conical element, created a new (identical) one, and the problem was gone. AC glitch. Fri, 21 Jun 2019 22:08:34 GMT https://community.graphisoft.com/t5/Modeling/SEO-Problem/m-p/234405#M125411 Dave Jochum 2019-06-21T22:08:34Z