# Solid.difference fails

**URL:** <https://forum.dynamobim.com/t/solid-difference-fails/22201>\
**Category:** Alias\
**Created:** [May 25, 2018, 1:08am UTC](https://forum.dynamobim.com/t/solid-difference-fails/22201 "2018-05-25T01:08:50Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![maxy\_13](https://avatars.discourse-cdn.com/v4/letter/m/e274bd/32.png) [@maxy\_13](https://forum.dynamobim.com/u/maxy_13)\
**Post date:** [May 25, 2018, 1:08am UTC](https://forum.dynamobim.com/t/solid-difference-fails/22201/1 "2018-05-25T01:08:51Z")

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Hi all;  
I am facing a situation at which solid.difference node fails for no apparent reason.  
The two intersecting geometries were straight and i have tested them inside alias using " shell intersect tool" and it was done successfully. I tested them in catia, made a boolean intersect as closed parts, it again showed no trouble.  
I attached two .SAT files for the geometries, may you check it yourselves.  
Thanks so much.

 ![Untitled-1](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/5/2/5279f64fb93f8c3ea456d3234ce472abd9e63492.jpg)

Important, rename tire.sat to tire.wire, i made thais because by this moment, .wire files are not allowed to by uploaded directly by the forums.

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<div class="post-metadata">

**Author:** ![maxy\_13](https://avatars.discourse-cdn.com/v4/letter/m/e274bd/32.png) [@maxy\_13](https://forum.dynamobim.com/u/maxy_13)\
**Post date:** [May 25, 2018, 7:42pm UTC](https://forum.dynamobim.com/t/solid-difference-fails/22201/2 "2018-05-25T19:42:41Z")

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Update: The reason that i made dents not directly by tools like “extrude as solids”, or “surface.thicken” because it generate very heavy surfaces. I made that twisty workflow to avoid this limitation.  
Interestingly, using the previous automated tool, solid.difference was made successfully.  
That is considered a fix to my issue, but it is still an universal issue to be considered.