<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:
Accès mémoire invalide.

Trace de la pile :
(003EF5F6) Driveview::_16452
(007E08AA) C4799_0
(007E2912) ____ExceptionHandler
(007DF88C) __ExceptionHandler
(0008A61F) ntdll.dll
(00077E7A) ntdll.dll.KiUserExceptionDispatcher
(003EF796) Driveview::TDriveView::FindNodeToPath
(003E33C7) Dirview::TDirView::LoadFiles
(003D8900) Customdirview::TCustomDirView::Load
(003E3200) Dirview::TDirView::Load
(003D85C7) Customdirview::TCustomDirView::Reload
(003E45E1) Dirview::TDirView::Reload
(0000C3ED) TCustomScpExplorerForm::ExecuteFileOperation
(0000CFB0) TCustomScpExplorerForm::ExecuteFileOperation
(0000D037) TCustomScpExplorerForm::ExecuteFileOperationCommand
(0000D16F) TCustomScpExplorerForm::ExecuteCopyOperationCommand
(0003226D) TNonVisualDataModule::ExplorerActionsExecute
(00382614) System::Actions::TContainedActionList::ExecuteAction
(0016A155) Vcl::Actnlist::TCustomAction::Execute
(0034059C) System::Classes::_18201
(000374F1) USER32.dll
(00015C3B) USER32.dll
(0001553C) USER32.dll
(000152FB) USER32.dll.DispatchMessageW

(003EF5F6) Driveview::_16452
(0008A61F) ntdll.dll
(00077E7A) ntdll.dll.KiUserExceptionDispatcher
(003EF796) Driveview::TDriveView::FindNodeToPath
(003E33C7) Dirview::TDirView::LoadFiles
(003D8900) Customdirview::TCustomDirView::Load
(003E3200) Dirview::TDirView::Load
(003D85C7) Customdirview::TCustomDirView::Reload
(003E45E1) Dirview::TDirView::Reload
(0000C3ED) TCustomScpExplorerForm::ExecuteFileOperation
%

The problem happens rarely. I cannot reproduce it.