STEP import not correct after update last week

[VectorTom]

I imported a STEP in the beginning of the week in Rhino 8 and everything was showing up like it has to be. This week there was an update of Rhino 8 and after installing the STEP file doesn’t import like it used to be, not everything shows up. When I import in Rhino 7 everything looks fine.

Rhino 8 SR11 2024-9-10 (Rhino 8, 8.11.24254.15001, Git hash:master @ d3c11108eae09fadc146928ba51b9b182a05303f)
License type: Commercial, build 2024-09-10
License details: Cloud Zoo

Windows 10 (10.0.19045 SR0.0) or greater (Physical RAM: 32GB)
.NET 7.0.20

Computer platform: DESKTOP

Standard graphics configuration.
Primary display and OpenGL: NVIDIA GeForce RTX 3060 (NVidia) Memory: 12GB, Driver date: 5-13-2024 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 555.85
> Accelerated graphics device with 4 adapter port(s)
- Windows Main Display attached to adapter port 0
- Secondary monitor attached to adapter port 1

OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
Redraw scene when viewports are exposed: On
Graphics level being used: OpenGL 4.6 (primary GPU’s maximum)

Anti-alias mode: 4x
Mip Map Filtering: Linear
Anisotropic Filtering Mode: High

Vendor Name: NVIDIA Corporation
Render version: 4.6
Shading Language: 4.60 NVIDIA
Driver Date: 5-13-2024
Driver Version: 32.0.15.5585
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 12 GB

Rhino plugins that do not ship with Rhino
C:\Program Files\Enscape\Enscape.Rhino.Plugin-net48\Enscape.Rhino8.Plugin.dll “Enscape.Rhino8.Plugin” 4.1.0.2288
C:\Program Files\Chaos Group\V-Ray\V-Ray for Rhinoceros\V8\VRayForRhino.rhp “V-Ray for Rhino”

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 8\Plug-ins\Commands.rhp “Commands” 8.11.24254.15001
C:\Program Files\Rhino 8\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 8\Plug-ins\AnimationTools.rhp “AnimationTools”
C:\Program Files\Rhino 8\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 8.11.24254.15001
C:\Program Files\Rhino 8\Plug-ins\RhinoRender.rhp “Legacy Rhino Render”
C:\Program Files\Rhino 8\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 8.11.24254.15001
C:\Program Files\Rhino 8\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 8\Plug-ins\import_STEP.rhp “STEP Import”
C:\Program Files\Rhino 8\Plug-ins\MeshCommands.rhp “MeshCommands” 8.11.24254.15001
C:\Program Files\Rhino 8\Plug-ins\RhinoCycles.rhp “RhinoCycles” 8.11.24254.15001
C:\Program Files\Rhino 8\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 8.11.24254.15001
C:\Program Files\Rhino 8\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 8\Plug-ins\Displacement.rhp “Displacement”
C:\Program Files\Rhino 8\Plug-ins\SectionTools.rhp “SectionTools”

[wim (Wim Dekeyser)]

Hi Tom -

@VectorTom

This week there was an update of Rhino 8 and after installing the STEP file doesn’t import like it used to be, not everything shows up.

We’ll need that STEP file to be able to troubleshoot this issue.
Thanks,
-wim

[VectorTom]

Hello Wim,

to what mail adres can I send it? It is over 20mb. I wasn’t able to upload it in the post.

Tom

[wim (Wim Dekeyser)]

Hi Tom -

@VectorTom

to what mail adres can I send it?

Please use Rhino Accounts to upload the file and make sure to copy the url to this discussion in the comments field.
-wim

[VectorTom]

Done

[wim (Wim Dekeyser)]

@VectorTom

Done

Thanks, Tom.
I’ve put this on the list as RH-83827 File IO: Missing Objects from STEP
-wim

[wim (Wim Dekeyser)]

Hi Tom -

@VectorTom

I imported a STEP in the beginning of the week in Rhino 8 and everything was showing up like it has to be. This week there was an update of Rhino 8 and after installing the STEP file doesn’t import like it used to be, not everything shows up.

This change is the result of an attempt to fix an issue when a STEP file is imported several times and new block definitions are created for identical blocks that already exist.

You can read the discussion about this here:

Importing STEP files to Rhino creates a new block

I have Solidworks and Inventor assemblies which I export from these two applications as STEP files. When I import those STEP files to Rhino, they become nested blocks, which is fantastic. However, each time the very same STEP file is imported, Rhino automatically creates a new block definition, and a new block instance from it. And it does this not only for the top most (parent) block, but also for all the nested blocks inside it. This makes the opportunity of using mechanical software’s ass…

This is clearly something that will be worked on further, but in the meanwhile, you can use the TestStepBlockHandling command to turn the current behavior off. You will have to use the No option in that command.
-wim

[brian (Brian Gillespie)]

RH-83827 is fixed in Rhino 8 Service Release 12