<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 5.17.10

Error message:
Acesso inválido à memória

Rastreamento de pilha:
(00DE0766) TFileFindDialog::FileFound
(000878AF) ntdll.dll
(00073EE1) ntdll.dll.KiUserExceptionDispatcher
(00DA6059) TTerminal::FileFind
(00D955AE) TTerminal::ProcessDirectory
(00DA647D) TTerminal::DoFilesFind
(00DA65DB) TTerminal::FilesFind
(00029DBB) TCustomScpExplorerForm::DoFindFiles
(00DE0458) TFileFindDialog::Start
(00DE0CEF) TFileFindDialog::StartStopButtonClick
(0027AD15) Vcl::Controls::TWinControl::WndProc
(001E2EA4) Vcl::Stdctrls::TButtonControl::WndProc
(0027AE7B) Vcl::Controls::_17076
(0027AD15) Vcl::Controls::TWinControl::WndProc
(002351DC) Vcl::Forms::TCustomForm::WndProc

(00085C54) TFrameAnimation::Repaint
(000878AF) ntdll.dll
(00073EE1) ntdll.dll.KiUserExceptionDispatcher
(00DE0CEF) TFileFindDialog::StartStopButtonClick
(0027AD15) Vcl::Controls::TWinControl::WndProc
(001E2EA4) Vcl::Stdctrls::TButtonControl::WndProc
(0027AE7B) Vcl::Controls::_17076
(0027AD15) Vcl::Controls::TWinControl::WndProc
(002351DC) Vcl::Forms::TCustomForm::WndProc

The problem happens rarely. I cannot reproduce it.

Thanks for your report.
I have sent you an email with a debug version of WinSCP to the address you have used to register on this forum.

<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 5.11.2

Error message:
Invalid access to memory.

Stack trace:
(007E78FA) TFileFindDialog::FileFound
(000851DF) ntdll.dll
(00073161) ntdll.dll.KiUserExceptionDispatcher
(007ADBF4) TTerminal::FileFind
(0079FD49) TTerminal::ProcessDirectory
(007AE019) TTerminal::DoFilesFind
(007ADDEC) TTerminal::FileFind
(0079FD49) TTerminal::ProcessDirectory
(007AE019) TTerminal::DoFilesFind
(007ADDEC) TTerminal::FileFind
(0079FD49) TTerminal::ProcessDirectory
(007AE019) TTerminal::DoFilesFind
(007ADDEC) TTerminal::FileFind
(0079FD49) TTerminal::ProcessDirectory
(007AE019) TTerminal::DoFilesFind
(007ADDEC) TTerminal::FileFind
(0079FD49) TTerminal::ProcessDirectory
(007AE019) TTerminal::DoFilesFind
(007ADDEC) TTerminal::FileFind
(0079FD49) TTerminal::ProcessDirectory
(007AE019) TTerminal::DoFilesFind
(007ADDEC) TTerminal::FileFind
(0079FD49) TTerminal::ProcessDirectory
(007AE019) TTerminal::DoFilesFind
(007AE169) TTerminal::FilesFind
(00024E2A) TCustomScpExplorerForm::DoFindFiles
(007E760F) TFileFindDialog::Start
(007E7D5F) TFileFindDialog::StartStopButtonClick
(00257C85) Vcl::Controls::TWinControl::WndProc
(001BFE14) Vcl::Stdctrls::TButtonControl::WndProc
(00257DEB) Vcl::Controls::_17076
(00257C85) Vcl::Controls::TWinControl::WndProc
(0021214C) Vcl::Forms::TCustomForm::WndProc

(00075664) TFrameAnimation::Repaint
(000851DF) ntdll.dll
(00073161) ntdll.dll.KiUserExceptionDispatcher
(007E7D5F) TFileFindDialog::StartStopButto

I know how to reproduce the problem or the problem happens frequently enough. I wish to be contacted by the WinSCP team to help resolving the problem.