複数のオブジェクトを 頂点・面を選択 で選択するとクラッシュします。
オブジェクトを一つずつ選択だとクラッシュしないようです。
Metasequoia 4 Ver4.6.5 (64bit) is running.
Build time: Jan 9 2018 19:39:29
Windows version : 6.3 Build:9600 (Windows 8.1 x64)
Number of CPU : 4
Physical memory : 8103 MB
Direct3D11 Driver: NVIDIA GeForce GTX 1070 Ti
DeviceID: 7042
SubsysID: 461508830
Revision: 161
FeatureLevel: 11.0
Exception code: c0000005 (EXCEPTION_ACCESS_VIOLATION)
Access violation at address 00007FF7C611C980. Read of address FFFFFFFFFFFFFFFF.
Module: C:\Program Files\tetraface\Metasequoia4\Metaseq.exe
0x00007FF7C611C980 Metaseq.exe: MDocument::addSelectLine + 80 bytes
0x00007FF7C623A9DF Metaseq.exe: ProcessSelectAllSelectedObject::Execute + 575 bytes
0x00007FF7C60CF309 Metaseq.exe: TFormMain::MenuSelectClick + 1513 bytes
0x00007FF7C5E535B3 Metaseq.exe: MTEventClosure<PyMQWidgetCallback<PyMQButton> >::invoke + 51 bytes
0x00007FFC08ACB9DA MTKit.dll: MTObject::invokeCallback + 90 bytes
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0x00007FFC08AC5035 MTKit.dll: MTMenuItemWidget::onLeftButtonUp + 1157 bytes
0x00007FFC08ACEE03 MTKit.dll: MTPopup::onLeftButtonUp + 483 bytes
0x00007FFC08A66311 MTKit.dll: MTApplication::wndProc + 5297 bytes
0x00007FFC08A64E52 MTKit.dll: MTApplication::globalWndProc + 34 bytes
0x00007FFC471124FD USER32.dll: DispatchMessageW + 349 bytes
0x00007FFC47112357 USER32.dll: NotifyWinEvent + 567 bytes
0x00007FFC08A6718B MTKit.dll: MTApplication::enterEventLoop + 571 bytes
0x00007FFC08ACE092 MTKit.dll: MTPopup::showPopup + 370 bytes
0x00007FF7C61E792D Metaseq.exe: TFormObjPanel::RightClickList + 1613 bytes
0x00007FF7C6207034 Metaseq.exe: TFormListPanel::ListBoxPaletteRightDown + 68 bytes
0x00007FF7C5E5360E Metaseq.exe: MTEventClosureWithArg<CommandBlobProcess,MTKeyEventArgs>::invoke + 62 bytes
0x00007FFC08ACBA7A MTKit.dll: MTObject::invokeCallback + 90 bytes
0x00007FFC08A65E72 MTKit.dll: MTApplication::wndProc + 4114 bytes
0x00007FFC08A64E52 MTKit.dll: MTApplication::globalWndProc + 34 bytes
0x00007FFC471124FD USER32.dll: DispatchMessageW + 349 bytes
0x00007FFC47112357 USER32.dll: NotifyWinEvent + 567 bytes
0x00007FFC08A6718B MTKit.dll: MTApplication::enterEventLoop + 571 bytes
0x00007FFC08A66F3F MTKit.dll: MTApplication::execute + 15 bytes
0x00007FF7C6127768 Metaseq.exe: wWinMain + 2568 bytes
0x00007FF7C635C7E3 Metaseq.exe: __scrt_common_main_seh + 279 bytes
0x00007FFC474013D2 KERNEL32.DLL: BaseThreadInitThunk + 34 bytes
0x00007FFC49A954F4 ntdll.dll: RtlUserThreadStart + 52 bytes