Entity isn't planar

neilyj666 · ‎01-14-2011

What does this mean (see screenshot) and how do I get around it??

Trying to convert the magenta object to feature line and the message appears - the object is a polyline and all Z values are zero.

Thanks

neilyj (No connection with Autodesk other than using the products in the real world)
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AEC Collection 2026 UKIE (mainly Civil 3D UKIE and IW)
Win 11 Pro x64, 1Tb Primary SSD, 1Tb Secondary SSD
64Gb RAM Intel(R) Xeon(R) W-11855M CPU @ 3.2GHz
NVIDIA RTX A5000 16Gb, Dual 27" Monitor, Dell Inspiron 7760

neilyj666 · ‎01-17-2011

Couldn't wait - I just used the file I posted and thanks again - thats brilliant; no idea what the code does but it works great.

I also tried the MIRROR3D as per earlier link which worked but the lisp is much easier

neilyj (No connection with Autodesk other than using the products in the real world)
Did you find this post helpful? Feel free to Like this post.
Did your question get successfully answered? Then click on the ACCEPT SOLUTION button.

AEC Collection 2026 UKIE (mainly Civil 3D UKIE and IW)
Win 11 Pro x64, 1Tb Primary SSD, 1Tb Secondary SSD
64Gb RAM Intel(R) Xeon(R) W-11855M CPU @ 3.2GHz
NVIDIA RTX A5000 16Gb, Dual 27" Monitor, Dell Inspiron 7760

Anonymous · ‎01-12-2016

I used "flatten" command and it fixed the issue.

IanMcClain · ‎07-08-2025

I'm having the same or similar issue:

I tried the normalize.lsp in 2023 and 2025, no errors but the objects still produce an error when trying to convert to feature lines>

Ian McClain

pendean · ‎07-08-2025

Ask in the C3D forum (software you are suing) and share a DWG sample with your new post (and/or do the same here) @IanMcClain

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Entity isn't planar

Entity isn't planar

Entity isn't planar