Short version - Rhino V6 locking up solved after 597 meshes in a Worksession attachment were joined into a single mesh.
I recently have used a file with very large meshes as an attachment using Worksession. The meshes have about 7.6 million vertices and 15 million faces. I have been using Contour and drawing lines. After a few minutes Rhino would lockup with the blue circle spinning. Sometimes it would recover after several minutes, sometimes it would be locked up until I ended Rhino after twenty minutes or more. Performance monitors showed lots of disk activity and 1 of 8 CPU threads at 100%.
I then discovered that what I thought was 3 meshes was actually 599 with what should have been 1 mesh was actually 597 meshes. I joined the 597 meshes and since then the locking up has stopped.
Rhino 6 SR14 2019-3-5 (Rhino 6, 6.14.19064.4371, Git hash:master @ d340745acddd7cdc24cc31904f467821e90ed976)
License type: Commercial, build 2019-03-05
License details: Cloud Zoo. In use by: David Cockey ()
Windows 10.0 SR0.0 or greater (Physical RAM: 16Gb)
Machine name: DESKTOP-7M1R2N0
Non-hybrid graphics.
Primary display and OpenGL: AMD Radeon HD 7700 Series (AMD) Memory: 2GB, Driver date: 2-20-2019 (M-D-Y). OpenGL Ver: 4.6.13547 Compatibility Profile Context 25.20.15025.1002
OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
Redraw scene when viewports are exposed: On
Anti-alias mode: 4x
Mip Map Filtering: Linear
Anisotropic Filtering Mode: Height
Vendor Name: ATI Technologies Inc.
Render version: 4.6
Shading Language: 4.60
Driver Date: 2-20-2019
Driver Version: 25.20.15025.1002
Maximum Texture size: 16384 x 16384
Z-Buffer depth: 24 bits
Maximum Viewport size: 16384 x 16384
Total Video Memory: 2 GB
Rhino plugins
C:\Program Files\Rhino 6\Plug-ins\Commands.rhp “Commands” 6.14.19064.4371
C:\Program Files\Rhino 6\Plug-ins\WebBrowser.rhp “WebBrowser”
C:\Program Files\Rhino 6\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 6\Plug-ins\RhinoScript.rhp “RhinoScript”
C:\Program Files\Rhino 6\Plug-ins\IdleProcessor.rhp “IdleProcessor”
C:\Program Files\Rhino 6\Plug-ins\RhinoRender.rhp “Rhino Render”
C:\Program Files\Rhino 6\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 6.14.19064.4371
C:\Program Files\Rhino 6\Plug-ins\rdk_ui.rhp “Renderer Development Kit UI”
C:\Program Files\Rhino 6\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 6\Plug-ins\Alerter.rhp “Alerter”
C:\Program Files\Orca3D V2\Orca3D.rhp “Orca3D” 2.0.5.0
C:\Program Files\Rhino 6\Plug-ins\RhinoCycles.rhp “RhinoCycles” 6.14.19064.4371
C:\Program Files\Rhino 6\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 6.14.19064.4371
C:\Program Files\Rhino 6\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 6\Plug-ins\Displacement.rhp “Displacement”
