Mesh modification randomly canceled

I dont know what i do that my mesh modification is randomly canceled when manipulating with blocks.

I dont do anything intentionally to turn off the pipe modification. It keeps happening.

Rhino 7 SR15 2022-1-12 (Rhino 7, 7.15.22012.13001, Git hash:master @ 25a34718429f10e873d3b0062bf0b769b46a2ecc)
License type: Commercial, build 2022-01-12
License details: Cloud Zoo

Windows 10.0.19044 SR0.0 or greater (Physical RAM: 16Gb)

Computer platform: LAPTOP - Plugged in [100% battery remaining]

Hybrid graphics configuration.
Primary display: Intel(R) UHD Graphics 630 (Intel) Memory: 1GB, Driver date: 2-25-2020 (M-D-Y).
> Integrated graphics device with 3 adapter port(s)
- Windows Main Display is laptop’s integrated screen or built-in port
Primary OpenGL: NVIDIA GeForce GTX 1050 Ti with Max-Q Design (NVidia) Memory: 4GB, Driver date: 5-5-2022 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 512.78
> Integrated accelerated graphics device with 4 adapter port(s)
- Secondary monitor is laptop’s integrated screen or built-in port

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: 5-5-2022
Driver Version:
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 4 GB

Rhino plugins that do not ship with Rhino
C:\Program Files\Chaos Group\V-Ray\V-Ray for Rhinoceros\V7\VRayForRhino.rhp “V-Ray for Rhino”
C:\Users\ivan_galik\AppData\Roaming\McNeel\Rhinoceros\packages\7.0\Acapulco\1.0.4\Acapulco.rhp “Acapulco”

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 7\Plug-ins\Commands.rhp “Commands” 7.15.22012.13001
C:\Program Files\Rhino 7\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 7\Plug-ins\RhinoScript.rhp “RhinoScript”
C:\Program Files\Rhino 7\Plug-ins\RhinoBonusTools.rhp “Rhino Bonus Tools”
C:\Program Files\Rhino 7\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 7.15.22012.13001
C:\Program Files\Rhino 7\Plug-ins\RhinoRender.rhp “Legacy Rhino Render”
C:\Program Files\Rhino 7\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 7.15.22012.13001
C:\Program Files\Rhino 7\Plug-ins\rdk_ui.rhp “Renderer Development Kit UI”
C:\Program Files\Rhino 7\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 7\Plug-ins\IronPython\RhinoDLR_Python.rhp “IronPython” 7.15.22012.13001
C:\Program Files\Rhino 7\Plug-ins\RhinoCycles.rhp “RhinoCycles” 7.15.22012.13001
C:\Program Files\Rhino 7\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 7.15.22012.13001
C:\Program Files\Rhino 7\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 7\Plug-ins\BlockEdit.rhp “BlockEdit” 7.15.22012.13001
C:\Program Files\Rhino 7\Plug-ins\Displacement.rhp “Displacement”
C:\Program Files\Rhino 7\Plug-ins\RhinoScriptEditor.rhp “RhinoScript Editor” 7.15.22012.13001
C:\Users\ivan_galik\AppData\Roaming\McNeel\Rhinoceros\packages\7.0\SectionTools\2021.4.30.511\SectionTools.rhp “SectionTools”

Hi Ivan -
Are you saying that you have a curve that has Curve Piping enabled and that you turned into a block, but somehow Curve Piping gets disabled?

In a quick test here on Rhino 8 without V-Ray and Acapulco, I can’t make that happen.


i already have block with curve piping enabled but when i manipulate the block, e.g. copying with gumball, sometimes curve piping inside block is disabled which is also noted in command line. i cant tell what triggers it specifically. sometimes esc button. sometimes opening block instance and moving control points. sometimes just copying whole block instance as i mentioned earlier.

Hi Ivan -
I’ve spent more time on this but can’t reproduce the behavior that you are getting.
If it’s somewhat easy to reproduce on your system, please try with the external plug-ins blocked.
Apart from that, I’ll need some more concrete steps and, perhaps, a file.

ok i will post an update when i catch it

1 Like

It happened again. I was just working in layouts not manipulating with the model at all and suddenly i realized some of the blocks are missing mesh modifications…

You can see its recorded in command but i possibly could not trigger it manually because those modifications are defined inside blocks and i did not even open one for editation…

please look at this its super annoying now i can fiddle with it for another hour (costs at least 50e to do nothing)

@ivan.galik - did you send us a file? If not , that wouyld be helpful - the develloper would like to have a look. Please include a link back to this topic in your comments, as well as anything you can about how to make the problem occur.


Hello, this is file unrelated. this has been happening on all my projects. i dont see any action which knowingly trigger that “mesh modification canceled” which is displayed in command line. maybe you can trace the problem figuring which events may trigger mesh modification canceled command

Hi Ivan -
Does this also happen when all 3rd party plug-ins are disabled and you are not running Grasshopper? We’ll need to be able to reproduce the issue to trace in the code where this is happening.

Hi @ivan.galik,

It is pressing escape that cancels and disables Curve Piping. It happens very easily in Rhino because escape is used for other purposes too. And it also happens when other application is active. I’ve logged an issue for improving this: