# STEP should be editable but nothing works

**URL:** <https://discourse.shapr3d.com/t/step-should-be-editable-but-nothing-works/39987>\
**Category:** Modeling Questions\
**Created:** [December 15, 2025, 10:12am UTC](https://discourse.shapr3d.com/t/step-should-be-editable-but-nothing-works/39987 "2025-12-15T10:12:37Z")\
**Posts on this page:** 9\
**Page:** 1

<div class="post-metadata">

**Author:** ![Peter\_b](https://avatars.discourse-cdn.com/v4/letter/p/85f322/32.png) [@Peter\_b](https://discourse.shapr3d.com/u/Peter_b)\
**Post date:** [December 15, 2025, 10:12am UTC](https://discourse.shapr3d.com/t/step-should-be-editable-but-nothing-works/39987/1 "2025-12-15T10:12:37Z")

</div>

[Wide v2.stp](https://discourse.shapr3d.com/uploads/short-url/fVVAGmt4XeBxA6p2BZfTgb6XxgF.stp) (8.5 MB)

So this looks like a clean STP file, not the ones imported with millions of triangles converted from STL files. I am not able to remove edges, mark and move, just nothing.

Any idea why and what I can do to work on this model?

---

<div class="post-metadata">

**Author:** ![Xdrakosha](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/xdrakosha/32/24881_2.png) [@Xdrakosha](https://discourse.shapr3d.com/u/Xdrakosha)\
**Post date:** [December 15, 2025, 7:00pm UTC](https://discourse.shapr3d.com/t/step-should-be-editable-but-nothing-works/39987/2 "2025-12-15T19:00:17Z")

</div>

What edges you want to “move”? It looks ok, don’t see any problems.

---

<div class="post-metadata">

**Author:** ![Peter\_b](https://avatars.discourse-cdn.com/v4/letter/p/85f322/32.png) [@Peter\_b](https://discourse.shapr3d.com/u/Peter_b)\
**Post date:** [December 15, 2025, 7:49pm UTC](https://discourse.shapr3d.com/t/step-should-be-editable-but-nothing-works/39987/3 "2025-12-15T19:49:46Z")

</div>

I am trying to lower the faceplate as far as possible. Did you load it and move faces/parts? For me nothing works. No move, no deletion of faces, cant change anything literally.

---

<div class="post-metadata">

**Author:** ![Xdrakosha](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/xdrakosha/32/24881_2.png) [@Xdrakosha](https://discourse.shapr3d.com/u/Xdrakosha)\
**Post date:** [December 15, 2025, 9:08pm UTC](https://discourse.shapr3d.com/t/step-should-be-editable-but-nothing-works/39987/4 "2025-12-15T21:08:08Z")

</div>

> [@Peter\_b](#):
>
> I am trying to lower the faceplate as far as possible.

I’m not sure I understand what that means. 🙂

> [@Peter\_b](#):
>
> I am not able to remove edges, mark and move, just nothing

It looks like you’re trying to perform invalid operations. S3D is a CAD tool for working with solids, and there are certain operations you can do. What you’re describing sounds more like surface modeling rather than solid modeling.

---

<div class="post-metadata">

**Author:** ![Peter\_b](https://avatars.discourse-cdn.com/v4/letter/p/85f322/32.png) [@Peter\_b](https://discourse.shapr3d.com/u/Peter_b)\
**Post date:** [December 16, 2025, 5:15am UTC](https://discourse.shapr3d.com/t/step-should-be-editable-but-nothing-works/39987/5 "2025-12-16T05:15:14Z")

</div>

Not trying to work surfaces but move parts which is solid. But OK Shapr cant work it it seems.

---

<div class="post-metadata">

**Author:** ![Xdrakosha](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/xdrakosha/32/24881_2.png) [@Xdrakosha](https://discourse.shapr3d.com/u/Xdrakosha)\
**Post date:** [December 16, 2025, 7:31am UTC](https://discourse.shapr3d.com/t/step-should-be-editable-but-nothing-works/39987/6 "2025-12-16T07:31:16Z")

</div>

> [@Peter\_b](#):
>
> but move parts

Parts are moving easily.  
But I assume you trying to do something else and calling it “move”.  
Can you make a video showing what exactly you trying to do?

---

<div class="post-metadata">

**Author:** ![Mathis58](https://avatars.discourse-cdn.com/v4/letter/m/ecae2f/32.png) [@Mathis58](https://discourse.shapr3d.com/u/Mathis58)\
**Post date:** [January 11, 2026, 2:03am UTC](https://discourse.shapr3d.com/t/step-should-be-editable-but-nothing-works/39987/7 "2026-01-11T02:03:59Z")

</div>

I can move the parts around. Not sure what you are asking?

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/0/d/0d95ea5b72ed8782399242a69a51e59b618381a1.jpeg)

---

<div class="post-metadata">

**Author:** ![Mathis58](https://avatars.discourse-cdn.com/v4/letter/m/ecae2f/32.png) [@Mathis58](https://discourse.shapr3d.com/u/Mathis58)\
**Post date:** [January 11, 2026, 2:25am UTC](https://discourse.shapr3d.com/t/step-should-be-editable-but-nothing-works/39987/8 "2026-01-11T02:25:45Z")

</div>

![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/0/4/04d648a48dd2d7d1227df7ff80ab7cc07f1a9e5f.jpeg)

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/b/f/bf143191d96d72c98795a82623827f6b38273798.jpeg)

Made some changes to mask cover..

---

<div class="post-metadata">

**Author:** ![Peter\_b](https://avatars.discourse-cdn.com/v4/letter/p/85f322/32.png) [@Peter\_b](https://discourse.shapr3d.com/u/Peter_b)\
**Post date:** [January 11, 2026, 3:47am UTC](https://discourse.shapr3d.com/t/step-should-be-editable-but-nothing-works/39987/9 "2026-01-11T03:47:07Z")

</div>

Yeah small changes are possible bu you can not mark and move faces. For example try to make the gasket/mask thinner, less high. Not possible. Shapr can not do surface modelling. I hope that comes one day.