https://forums.autodesk.com/t5/meshmixer-forum/meshmixer-tools-not-working-red-lines/m-p/9335536#M2849 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="meshmixerrors3.jpg" style="width: 749px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/732996i443C0FE4D5F57300/image-size/large?v=v2&amp;px=999" role="button" title="meshmixerrors3.jpg" alt="meshmixerrors3.jpg" /></span></P><P>Why do I keep getting these red lines and meshmixer tools don't work (ie. extrude, smooth boundary, and several other tools)</P> Sat, 22 Feb 2020 18:35:05 GMT Anonymous 2020-02-22T18:35:05Z https://forums.autodesk.com/t5/meshmixer-forum/meshmixer-tools-not-working-red-lines/m-p/9335536#M2849 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="meshmixerrors3.jpg" style="width: 749px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/732996i443C0FE4D5F57300/image-size/large?v=v2&amp;px=999" role="button" title="meshmixerrors3.jpg" alt="meshmixerrors3.jpg" /></span></P><P>Why do I keep getting these red lines and meshmixer tools don't work (ie. extrude, smooth boundary, and several other tools)</P> Sat, 22 Feb 2020 18:35:05 GMT https://forums.autodesk.com/t5/meshmixer-forum/meshmixer-tools-not-working-red-lines/m-p/9335536#M2849 Anonymous 2020-02-22T18:35:05Z https://forums.autodesk.com/t5/meshmixer-forum/meshmixer-tools-not-working-red-lines/m-p/9338873#M2850 <P>Red lines in MM highlight non manifold issues (more than two faces share the same edge or a "spinning off" face is connected to a closed surface by a vertex). Such issues make most tools fail...</P> <P>Did you get this result using MM tools before (if yes what was your workflow?) or did you import from another application?</P> Mon, 24 Feb 2020 23:00:14 GMT https://forums.autodesk.com/t5/meshmixer-forum/meshmixer-tools-not-working-red-lines/m-p/9338873#M2850 Anonymous 2020-02-24T23:00:14Z https://forums.autodesk.com/t5/meshmixer-forum/meshmixer-tools-not-working-red-lines/m-p/9338914#M2851 I imported an STL file from blue sky bio Mon, 24 Feb 2020 23:38:01 GMT https://forums.autodesk.com/t5/meshmixer-forum/meshmixer-tools-not-working-red-lines/m-p/9338914#M2851 Anonymous 2020-02-24T23:38:01Z https://forums.autodesk.com/t5/meshmixer-forum/meshmixer-tools-not-working-red-lines/m-p/9340838#M2852 <P>Can you post the file here (or load it to some file sharing service and send me the download link via PM).</P> <P>I'll look into it.</P> Tue, 25 Feb 2020 18:26:58 GMT https://forums.autodesk.com/t5/meshmixer-forum/meshmixer-tools-not-working-red-lines/m-p/9340838#M2852 Anonymous 2020-02-25T18:26:58Z