(undo) minimum number of executions problem

Does Rhino 7 have a fixed number of undos?
During the work (undo) did not go back to the beginning of the work, so all the data is corrupted.

Undo help

  • File operations or changes made to viewports or construction planes cannot be undone by the Undo command. Use the UndoView command to undo changes made to the view.
  • The number of commands you can undo depends on the memory size reserved for undo. Change the undo options in [General Options](https://docs.mcneel.com/rhino/7/help/en-us/options/general.htm).

To change the memory setting for Undo:
Options > Rhino Options > General > Undo

I set the memory value to 10Gb, but I asked because the data went away.

Hello - the number of undos depends on the geometry and operations - if you make one small change on a huge mesh, the entire mesh must go into the Undo - this can, potentially, fill up the available memory quickly. If you are making lines, the amount of memory used is small so more steps are possible.


It was 40 megabytes of data and I worked for 1 hour. I don’t understand.

Do you have Autosave enabled? If so an auto-saved version may be available in the designated file location for Autosave or in your Windows Recycle bin.

Hello - please run SystemInfo in Rhino and Copy/Paste the results.


Rhino 7 SR3 2021-1-26 (Rhino 7, 7.3.21026.13001, Git hash:master @ 33003e99b55b3e99bc54b233a1b4cfd15b4a8ab2)
License type: Commercial, build 2021-01-26
License details: Stand-Alone

Windows 10.0.19042 SR0.0 or greater (Physical RAM: 32Gb)

Computer platform: DESKTOP

Standard graphics configuration.
Primary display and OpenGL: NVIDIA GeForce RTX 2080 (NVidia) Memory: 8GB, Driver date: 12-31-2020 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 461.09
> Accelerated graphics device with 4 adapter port(s)
- Windows Main Display attached to adapter port #0

OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
Redraw scene when viewports are exposed: On

Anti-alias mode: 8x
Mip Map Filtering: Linear
Anisotropic Filtering Mode: High

Vendor Name: NVIDIA Corporation
Render version: 4.6
Shading Language: 4.60 NVIDIA
Driver Date: 12-31-2020
Driver Version:
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 8 GB

Rhino plugins that do not ship with Rhino

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 7\Plug-ins\Commands.rhp “Commands” 7.3.21026.13001
C:\Program Files\Rhino 7\Plug-ins\WebBrowser.rhp “WebBrowser”
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\RPC.rhp “RPC”
C:\Program Files\Rhino 7\Plug-ins\AnimationTools.rhp “AnimationTools”
C:\Program Files\Rhino 7\Plug-ins\IdleProcessor.rhp “IdleProcessor”
C:\Program Files\Rhino 7\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 7.3.21026.13001
C:\Program Files\Rhino 7\Plug-ins\RhinoRender.rhp “Legacy Rhino Render”
C:\Program Files\Rhino 7\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 7.3.21026.13001
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\Alerter.rhp “Alerter”
C:\Program Files\Rhino 7\Plug-ins\RhinoCycles.rhp “RhinoCycles” 7.3.21026.13001
C:\Program Files\Rhino 7\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 7.3.21026.13001
C:\Program Files\Rhino 7\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 7\Plug-ins\Displacement.rhp “Displacement”