<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)>
**** This error happen during directory update ****

WinSCP 5.7.7

Error message:
Acceso a memoria no válido

Traza de la pila:
(0021F423) Vcl::Controls::TWinControl::HandleNeeded
(0008A61F) ntdll.dll
(00077E7A) ntdll.dll.KiUserExceptionDispatcher
(002532F2) Vcl::Comctrls::TCustomTreeView::CNNotify
(003DE479) Customdriveview::TCustomDriveView::CNNotify
(0021C609) Vcl::Controls::TWinControl::WndProc
(002535AE) Vcl::Comctrls::TCustomTreeView::WndProc
(0021C76F) Vcl::Controls::_17076
(0021C609) Vcl::Controls::TWinControl::WndProc
(0021BC50) Vcl::Controls::TWinControl::MainWndProc
(0034059C) System::Classes::_18201
(000374F1) USER32.dll
(00015C3B) USER32.dll
(0001581B) USER32.dll
(0001C167) USER32.dll
(00077E54) ntdll.dll.KiUserCallbackDispatcher
(00014EDE) USER32.dll.SendMessageW
(0007DBD8) COMCTL32.DLL
(00034F23) COMCTL32.DLL
(00034D8A) COMCTL32.DLL
(00038E87) COMCTL32.DLL
(000374F1) USER32.dll
(00015C3B) USER32.dll
(000159D2) USER32.dll.CallWindowProcW
(0021C71A) Vcl::Controls::TWinControl::DefaultHandler
(0021C609) Vcl::Controls::TWinControl::WndProc
(002535AE) Vcl::Comctrls::TCustomTreeView::WndProc
(0034059C) System::Classes::_18201
(000374F1) USER32.dll
(00015C3B) USER32.dll
(0001581B) USER32.dll
(0001C167) USER32.dll
(00077E54) ntdll.dll.KiUserCallbackDispatcher
(00014EDE) USER32.dll.SendMessageW
(002FDA97) Winapi::Commctrl::TreeView_SelectItem
(003DD2ED) Customdriveview::TCustomDriveView::CreateWnd
(00619C87) TCustomUnixDriveView::FindNodeToPath
(00619C87)%

The problem happens rarely. I cannot reproduce it.