<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 5.7.7

Error message:
Invalid access to memory.

Stack trace:
(003F024A) Driveview::TDriveView::ValidateDirectoryEx
(007E08AA) C4799_0
(007E2912) ____ExceptionHandler
(007DF88C) __ExceptionHandler
(00062496) ntdll.dll
(0000F13E) ntdll.dll.KiUserExceptionDispatcher
(003EF645) Driveview::_16452
(003EF550) Driveview::_16451
(003EF626) Driveview::_16452
(003EF550) Driveview::_16451
(003EF626) Driveview::_16452
(003EF550) Driveview::_16451
(003EF626) Driveview::_16452
(003EF550) Driveview::_16451
(003EF626) Driveview::_16452
(003EF796) Driveview::TDriveView::FindNodeToPath
(003F1315) Driveview::TDriveView::FindPathNode
(003DED3A) Customdriveview::TCustomDriveView::SetDirectory
(003F13C4) Driveview::TDriveView::SetDirectory
(003E20CA) Dirview::TDirView::SetPath
(0003B389) TScpCommanderForm::TerminalChanged
(000055A8) TCustomScpExplorerForm::SetTerminal
(000766F0) TTerminalManager::SetScpExplorer
(00002462) wWinMain
(007DEA01) C4667_0
(00038900) ntdll.dll
(000388D0) ntdll.dll

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 5.7.7

Error message:
Invalid access to memory.

Stack trace:
(003F024A) Driveview::TDriveView::ValidateDirectoryEx
(007E08AA) C4799_0
(007E2912) ____ExceptionHandler
(007DF88C) __ExceptionHandler
(00045CC6) ntdll.dll.RtlRaiseStatus
(00045B52) ntdll.dll.KiUserExceptionDispatcher
(003EF4E9) Driveview::_16451
(003EF655) Driveview::_16452
(003EF550) Driveview::_16451
(003EF626) Driveview::_16452
(003EF796) Driveview::TDriveView::FindNodeToPath
(003F1315) Driveview::TDriveView::FindPathNode
(003DED3A) Customdriveview::TCustomDriveView::SetDirectory
(003F13C4) Driveview::TDriveView::SetDirectory
(003E20CA) Dirview::TDirView::SetPath
(0003B389) TScpCommanderForm::TerminalChanged
(000055A8) TCustomScpExplorerForm::SetTerminal
(00079289) TTerminalManager::TerminalReady
(00076742) TTerminalManager::SetActiveTerminal
(00019E50) TCustomScpExplorerForm::SessionsPageControlChange
(0021C609) Vcl::Controls::TWinControl::WndProc
(00217700) Vcl::Controls::TControl::Perform
(0021C76F) Vcl::Controls::_17076
(0021C609) Vcl::Controls::TWinControl::WndProc
(001D73AC) Vcl::Forms::TCustomForm::WndProc
(0078E0D1) Vclcommon::C2516_0
(0021BC50) Vcl::Controls::TWinControl::MainWndProc
(0034059C) System::Classes::_18201
(0001B4F4) USER32.dll
(0001B5F2) USER32.dll
(00013F16) USER32.dll
(00013F8A) USER32.dll
(00045B2B) ntdll.dll.KiUserCallbackDispatcher
(0001458D) USER32.dll.SendMessageW
(0002B06D) COMCTL32.DLL
(00022657) COMCTL32.DLL
(000474F2)%

The problem happens rarely. I cannot reproduce it.