Didn't do anything really. Kept Winscp running overnight with connected sessions. Overnight, some connections dropped. When I started to use the computer again in the morning - 10 minutes after I did so - Winscp started to give many of these errors in quick succession.

WinSCP 5.18

Error message:
Invalid access to memory.

Stack trace:
(000391F1) ntdll.dll
(0006248E) ntdll.dll
(0000F15E) ntdll.dll.KiUserExceptionDispatcher
(00039274) ntdll.dll.RtlDosPathNameToRelativeNtPathName_U_WithStatus
(00018D3B) KERNELBASE.dll.GetFileAttributesExW
(004145A2) System::Sysutils::_16838
(004146BE) System::Sysutils::FileAge
(00018FA4) TCustomScpExplorerForm::Idle
(0004C867) TNonVisualDataModule::DoIdle
(0004C824) TNonVisualDataModule::SessionIdleTimerTimer
(003C72F8) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167C2) USER32.dll
(00016885) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

erfan.febriant@... wrote:

WinSCP 5.15.9

Error message:
Invalid access to memory.

Stack trace:
(00049074) ntdll.dll
(0003EF5E) ntdll.dll.ZwWow64CallFunction64
(0003F6EA) ntdll.dll.KiUserExceptionDispatcher
(00048F02) ntdll.dll
(00049650) ntdll.dll
(0005F6FC) ntdll.dll.RtlDosPathNameToRelativeNtPathName_U_WithStatus
(00018D20) KERNELBASE.dll.GetFileAttributes*ExW
(003F114A) System::Sysutils::_16838
(003F1266) System::Sysutils::FileAge
(0001885D) TCustomScpExplorerForm::Idle
...

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.

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 5.15.9

Error message:
Invalid access to memory.

Stack trace:
(00049083) ntdll.dll
(0003EF5E) ntdll.dll.ZwWow64CallFunction64
(0003F6EA) ntdll.dll.KiUserExceptionDispatcher
(00048F02) ntdll.dll
(00049650) ntdll.dll
(0005F6FC) ntdll.dll.RtlDosPathNameToRelativeNtPathName_U_WithStatus
(00018D20) KERNELBASE.dll.GetFileAttributesExW
(003F114A) System::Sysutils::_16838
(003F1266) System::Sysutils::FileAge
(0001885D) TCustomScpExplorerForm::Idle
(000482E3) TNonVisualDataModule::DoIdle
(000482A0) TNonVisualDataModule::SessionIdleTimerTimer
(003A3E7C) System::Classes::_18201
(00007FFF) USER32.DLL.CallNextHookEx
(0000825C) USER32.DLL
(000097FA) USER32.DLL
(0000986B) USER32.DLL.DispatchMessageW

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.

<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 5.15.9

Error message:
Invalid access to memory.

Stack trace:
(00049074) ntdll.dll
(0003EF5E) ntdll.dll.ZwWow64CallFunction64
(0003F6EA) ntdll.dll.KiUserExceptionDispatcher
(00048F02) ntdll.dll
(00049650) ntdll.dll
(0005F6FC) ntdll.dll.RtlDosPathNameToRelativeNtPathName_U_WithStatus
(00018D20) KERNELBASE.dll.GetFileAttributesExW
(003F114A) System::Sysutils::_16838
(003F1266) System::Sysutils::FileAge
(0001885D) TCustomScpExplorerForm::Idle
(000482E3) TNonVisualDataModule::DoIdle
(000482A0) TNonVisualDataModule::SessionIdleTimerTimer
(003A3E7C) System::Classes::_18201
(00007FFF) USER32.DLL.CallNextHookEx
(0000825C) USER32.DLL
(000097FA) USER32.DLL
(0000986B) USER32.DLL.DispatchMessageW

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.

<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 5.15.9

Error message:
Invalid access to memory.

Stack trace:
(00049074) ntdll.dll
(0003EF5E) ntdll.dll.ZwWow64CallFunction64
(0003F6EA) ntdll.dll.KiUserExceptionDispatcher
(00048F02) ntdll.dll
(00049650) ntdll.dll
(0005F6FC) ntdll.dll.RtlDosPathNameToRelativeNtPathName_U_WithStatus
(00018D20) KERNELBASE.dll.GetFileAttributesExW
(003F114A) System::Sysutils::_16838
(003F1266) System::Sysutils::FileAge
(0001885D) TCustomScpExplorerForm::Idle
(000482E3) TNonVisualDataModule::DoIdle
(000482A0) TNonVisualDataModule::SessionIdleTimerTimer
(003A3E7C) System::Classes::_18201
(00007FFF) USER32.DLL.CallNextHookEx
(0000825C) USER32.DLL
(000097FA) USER32.DLL
(0000986B) USER32.DLL.DispatchMessageW

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 5.15.1

Error message:
Ошибка доступа к памяти.

Трассировка стека:
(00039955) ntdll.dll
(0092636E) C5153_3
(009283D6) ____ExceptionHandler
(00925190) __ExceptionHandler
(0005A466) ntdll.dll
(0000F12E) ntdll.dll.KiUserExceptionDispatcher
(000399D8) ntdll.dll.RtlDosPathNameToRelativeNtPathName_U_WithStatus
(00018B77) KERNELBASE.dll.GetFileAttributesExW
(003F073A) System::Sysutils::_16838
(003F0856) System::Sysutils::FileAge
(0006EFFE) TEditorManager::FileClosed
(00860F52) TEditorForm::FormClose
(00278809) Vcl::Controls::TWinControl::WndProc
(00232CD0) Vcl::Forms::TCustomForm::WndProc

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 5.15.2

Error message:
Invalid access to memory.

Stack trace:
(000487E0) ntdll.dll.RtlInitUnicodeStringEx
(0092709A) C5157_3
(00929102) ____ExceptionHandler
(00925EBC) __ExceptionHandler
(0003EF0E) ntdll.dll.ZwWow64CallFunction64
(0003F68A) ntdll.dll.KiUserExceptionDispatcher
(0005F69E) ntdll.dll.RtlDosPathNameToRelativeNtPathName_U_WithStatus
(00020D00) KERNELBASE.dll.GetFileAttributesExW
(003F0E76) System::Sysutils::_16838
(003F0F92) System::Sysutils::FileAge
(0006F14A) TEditorManager::FileClosed
(00861BC2) TEditorForm::FormClose
(00278F45) Vcl::Controls::TWinControl::WndProc
(0023340C) Vcl::Forms::TCustomForm::WndProc

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 5.13.4

Error message:
Invalid access to memory.

Stack trace:
(000391F1) ntdll.dll
(0006248E) ntdll.dll
(0000F15E) ntdll.dll.KiUserExceptionDispatcher
(00039274) ntdll.dll.RtlDosPathNameToRelativeNtPathName_U_WithStatus
(00018D3B) KERNELBASE.dll.GetFileAttributesExW
(003CC70E) System::Sysutils::_16838
(003CC82A) System::Sysutils::FileAge
(000175AD) TCustomScpExplorerForm::Idle
(0003EDF7) TNonVisualDataModule::DoIdle
(0003EDB4) TNonVisualDataModule::SessionIdleTimerTimer
(00380D20) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167BF) USER32.dll
(00016885) USER32.dll.DispatchMessageW

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 5.13.8

Error message:
Invalid access to memory.

Stack trace:
(00048F03) ntdll.dll
(0003EE3E) ntdll.dll.ZwWow64CallFunction64
(0003F5BA) ntdll.dll.KiUserExceptionDispatcher
(00048D82) ntdll.dll
(000494D0) ntdll.dll
(0005F4BC) ntdll.dll.RtlDosPathNameToRelativeNtPathName_U_WithStatus
(00032F50) KERNELBASE.dll.GetFileAttributesExW
(003CCA8A) System::Sysutils::_16838
(003CCBA6) System::Sysutils::FileAge
(00017675) TCustomScpExplorerForm::Idle
(0003EF0B) TNonVisualDataModule::DoIdle
(0003EEC8) TNonVisualDataModule::SessionIdleTimerTimer
(0038109C) System::Classes::_18201
(00007E6F) USER32.DLL.CallNextHookEx
(000080CC) USER32.DLL
(0000966A) USER32.DLL
(000096DB) USER32.DLL.DispatchMessageW

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.

<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 5.13.4

Error message:
Invalid access to memory.

Stack trace:
(000391F1) ntdll.dll
(0006248E) ntdll.dll
(0000F15E) ntdll.dll.KiUserExceptionDispatcher
(00039274) ntdll.dll.RtlDosPathNameToRelativeNtPathName_U_WithStatus
(00018CE0) KERNELBASE.dll.GetFileAttributesExW
(003CC70E) System::Sysutils::_16838
(003CC82A) System::Sysutils::FileAge
(000175AD) TCustomScpExplorerForm::Idle
(0003EDF7) TNonVisualDataModule::DoIdle
(0003EDB4) TNonVisualDataModule::SessionIdleTimerTimer
(00380D20) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167BF) USER32.dll
(00016885) USER32.dll.DispatchMessageW

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.

The server times out and prompts for OTP.
Leave that sit long enough, not sure exactly, maybe an hour.
Then I get pop up errors that I can not close.
I have to go to task manager and kill the process.

WinSCP 5.13.4

Error message:
Invalid access to memory.

Stack trace:
(000391F1) ntdll.dll
(0006248E) ntdll.dll
(0000F15E) ntdll.dll.KiUserExceptionDispatcher
(00039274) ntdll.dll.RtlDosPathNameToRelativeNtPathName_U_WithStatus
(00018CE0) KERNELBASE.dll.GetFileAttributesExW
(003CC70E) System::Sysutils::_16838
(003CC82A) System::Sysutils::FileAge
(000175AD) TCustomScpExplorerForm::Idle
(0003EDF7) TNonVisualDataModule::DoIdle
(0003EDB4) TNonVisualDataModule::SessionIdleTimerTimer
(00380D20) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167BF) USER32.dll
(00016885) USER32.dll.DispatchMessageW

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.

happened to me when dooublecking on a image file

<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 5.13.4

Error message:
Chyba přístupu do paměti.

Stack trace:
(00049C50) ntdll.dll.RtlInitUnicodeStringEx
(008BDC8E) C5104_3
(008BFCF6) ____ExceptionHandler
(008BCAB0) __ExceptionHandler
(0007DA8F) ntdll.dll
(0006B6B1) ntdll.dll.KiUserExceptionDispatcher
(00049BFE) ntdll.dll.RtlDosPathNameToRelativeNtPathName_U_WithStatus
(000EE6A0) KERNELBASE.dll.GetFileAttributesExW
(003CC70E) System::Sysutils::_16838
(003CC82A) System::Sysutils::FileAge
(0006541E) TEditorManager::FileClosed
(00801026) TEditorForm::FormClose
(0025B9D5) Vcl::Controls::TWinControl::WndProc
(00215E9C) 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 5.13.4

Error message:
Invalid access to memory.

Stack trace:
(00039221) ntdll.dll
(0006248E) ntdll.dll
(0000F15E) ntdll.dll.KiUserExceptionDispatcher
(000392A4) ntdll.dll.RtlDosPathNameToRelativeNtPathName_U_WithStatus
(00018CE0) KERNELBASE.dll.GetFileAttributesExW
(003CC70E) System::Sysutils::_16838
(003CC82A) System::Sysutils::FileAge
(000175AD) TCustomScpExplorerForm::Idle
(0003EDF7) TNonVisualDataModule::DoIdle
(0003EDB4) TNonVisualDataModule::SessionIdleTimerTimer
(00380D20) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167BF) USER32.dll
(00016885) USER32.dll.DispatchMessageW

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.

<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 5.13.1

Error message:
Invalid access to memory.

Stack trace:
(00039221) ntdll.dll
(0006248E) ntdll.dll
(0000F15E) ntdll.dll.KiUserExceptionDispatcher
(000392A4) ntdll.dll.RtlDosPathNameToRelativeNtPathName_U_WithStatus
(00018CE0) KERNELBASE.dll.GetFileAttributesExW
(003CA74E) System::Sysutils::_16838
(003CA86A) System::Sysutils::FileAge
(00017531) TCustomScpExplorerForm::Idle
(0003DFD7) TNonVisualDataModule::DoIdle
(0003DF94) TNonVisualDataModule::SessionIdleTimerTimer
(0037ED60) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167BF) USER32.dll
(00016885) USER32.dll.DispatchMessageW

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 5.13.2

Error message:
Invalid access to memory.

Stack trace:
(00035D50) ntdll.dll.RtlInitUnicodeStringEx
(008BC642) C5104_0
(008BE6AA) ____ExceptionHandler
(008BB464) __ExceptionHandler
(0007CD1F) ntdll.dll
(0006A9B1) ntdll.dll.KiUserExceptionDispatcher
(00035CFE) ntdll.dll.RtlDosPathNameToRelativeNtPathName_U_WithStatus
(000EE230) KERNELBASE.dll.GetFileAttributesExW
(003CBC1A) System::Sysutils::_16838
(003CBD36) System::Sysutils::FileAge
(00065292) TEditorManager::FileClosed
(007FFCA2) TEditorForm::FormClose
(0025AEE1) Vcl::Controls::TWinControl::WndProc
(002153A8) Vcl::Forms::TCustomForm::WndProc

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 5.13.1

Error message:
Invalid access to memory.

Stack trace:
(00039221) ntdll.dll
(0006248E) ntdll.dll
(0000F15E) ntdll.dll.KiUserExceptionDispatcher
(000392A4) ntdll.dll.RtlDosPathNameToRelativeNtPathName_U_WithStatus
(00018CE0) KERNELBASE.dll.GetFileAttributesExW
(003CA74E) System::Sysutils::_16838
(003CA86A) System::Sysutils::FileAge
(00017531) TCustomScpExplorerForm::Idle
(0003DFD7) TNonVisualDataModule::DoIdle
(0003DF94) TNonVisualDataModule::SessionIdleTimerTimer
(0037ED60) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167BF) USER32.dll
(00016885) USER32.dll.DispatchMessageW

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 5.13.1

Error message:
Invalid access to memory.

Stack trace:
(00039221) ntdll.dll
(0006248E) ntdll.dll
(0000F15E) ntdll.dll.KiUserExceptionDispatcher
(000392A4) ntdll.dll.RtlDosPathNameToRelativeNtPathName_U_WithStatus
(00018CE0) KERNELBASE.dll.GetFileAttributesExW
(003CA74E) System::Sysutils::_16838
(003CA86A) System::Sysutils::FileAge
(00017531) TCustomScpExplorerForm::Idle
(0003DFD7) TNonVisualDataModule::DoIdle
(0003DF94) TNonVisualDataModule::SessionIdleTimerTimer
(0037ED60) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167BF) USER32.dll
(00016885) USER32.dll.DispatchMessageW

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 5.13.1

Error message:
External exception C000001D

Stack trace:
(00049131) ntdll.dll
(0003EF0E) ntdll.dll.ZwWow64CallFunction64
(0003F68A) ntdll.dll.KiUserExceptionDispatcher
(00048EC2) ntdll.dll
(00049610) ntdll.dll
(0005F67C) ntdll.dll.RtlDosPathNameToRelativeNtPathName_U_WithStatus
(0001D930) KERNELBASE.dll.GetFileAttributesExW
(003CA74E) System::Sysutils::_16838
(003CA86A) System::Sysutils::FileAge
(00017531) TCustomScpExplorerForm::Idle
(0003DFD7) TNonVisualDataModule::DoIdle
(0003DF94) TNonVisualDataModule::SessionIdleTimerTimer
(0037ED60) System::Classes::_18201
(00007E6F) USER32.DLL.CallNextHookEx
(000080CC) USER32.DLL
(0000966A) USER32.DLL
(000096DB) USER32.DLL.DispatchMessageW

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.

<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 5.13

Error message:
Invalid access to memory.

Stack trace:
(00051050) ntdll.dll.RtlInitUnicodeStringEx
(0008519F) ntdll.dll
(000731B1) ntdll.dll.KiUserExceptionDispatcher
(00050FFE) ntdll.dll.RtlDosPathNameToRelativeNtPathName_U_WithStatus
(000F89C0) KERNELBASE.dll.GetFileAttributesExW
(003CA702) System::Sysutils::_16838
(003CA81E) System::Sysutils::FileAge
(00017531) TCustomScpExplorerForm::Idle
(0003DFD7) TNonVisualDataModule::DoIdle
(0003DF94) TNonVisualDataModule::SessionIdleTimerTimer
(0037ED14) System::Classes::_18201
(00031B59) USER32.dll
(000240EE) USER32.dll
(00023A7D) USER32.dll
(0002384B) USER32.dll.DispatchMessageW

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 5.9.6

Error message:
Invalid access to memory.

Stack trace:
(00032AD0) ntdll.dll.RtlInitUnicodeStringEx
(008689AA) C5077_0
(0086AA12) ____ExceptionHandler
(008677CC) __ExceptionHandler
(00081CFF) ntdll.dll
(0006F87A) ntdll.dll.KiUserExceptionDispatcher
(00032A7E) ntdll.dll.RtlDosPathNameToRelativeNtPathName_U_WithStatus
(000D8170) KERNELBASE.dll.GetFileAttributesExW
(003BEF2A) System::Sysutils::_16838
(003BF046) System::Sysutils::FileAge
(000638CA) TEditorManager::FileClosed
(007BAFB2) TEditorForm::FormClose
(0024F5A1) Vcl::Controls::TWinControl::WndProc
(00209A50) Vcl::Forms::TCustomForm::WndProc
(0080DEAC) Vclcommon::C2758_0
(0024EBE8) Vcl::Controls::TWinControl::MainWndProc
(00373564) System::Classes::_18201
(0002C2B1) USER32.dll
(0000D885) USER32.dll
(0000D4BB) USER32.dll
(00017B07) USER32.dll
(0006F854) ntdll.dll.KiUserCallbackDispatcher
(0000E906) USER32.dll
(0003242C) UXTHEME.DLL
(000321B0) UXTHEME.DLL
(00025BB5) UXTHEME.DLL
(000255E3) UXTHEME.DLL
(0000EB91) USER32.dll
(0002C2B1) USER32.dll
(0000D885) USER32.dll
(0000CF12) USER32.dll.CallWindowProcW
(0024F6B2) Vcl::Controls::TWinControl::DefaultHandler
(0020CE35) Vcl::Forms::TCustomForm::WMSysCommand
(0024F5A1) Vcl::Controls::TWinControl::WndProc
(00209A50) Vcl::Forms::TCustomForm::WndProc
(0080DEAC) Vclcommon::C2758_0
(0024EBE8) Vcl::Controls::TWinControl::MainWndProc
(00373564) System::Classes::_18201
(0002C2B1) USER32.dll
(0000D885) USER3

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 5.9.4

Error message:
Zugriffsverletzung - ungültiger Zugriff auf den Speicher.

Stack trace:
(000392E1) ntdll.dll
(00866B5E) C5073_0
(00868BC6) ____ExceptionHandler
(00865980) __ExceptionHandler
(000624F6) ntdll.dll
(0000F13E) ntdll.dll.KiUserExceptionDispatcher
(00039364) ntdll.dll.RtlDosPathNameToRelativeNtPathName_U_WithStatus
(00018CDF) KERNELBASE.dll.GetFileAttributesExW
(003BEBF2) System::Sysutils::_16838
(003BED0E) System::Sysutils::FileAge
(0006388A) TEditorManager::FileClosed
(007B944E) TEditorForm::FormClose
(0024F269) Vcl::Controls::TWinControl::WndProc
(00209718) Vcl::Forms::TCustomForm::WndProc
(0080C348) Vclcommon::C2754_0
(0024E8B0) Vcl::Controls::TWinControl::MainWndProc
(0037322C) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(00015DE3) USER32.dll
(00015E41) USER32.dll
(0000F117) ntdll.dll.KiUserCallbackDispatcher
(00015A87) USER32.dll
(00016742) UXTHEME.DLL
(0001908D) UXTHEME.DLL
(0000FB0A)UXTHEME.DLL
(0000FB91)UXTHEME.DLL
(00016294) USER32.dll
(000152F7) USER32.dll
(00015D35) USER32.dll
(0001FD3A) USER32.dll
(0001FD60) USER32.dll.CallWindowProcW
(0024F37A) Vcl::Controls::TWinControl::DefaultHandler
(0020CAFD) Vcl::Forms::TCustomForm::WMSysCommand
(0024F269) Vcl::Controls::TWinControl::WndProc
(00209718) Vcl::Forms::TCustomForm::WndProc
(0080C348) Vclcommon::C2754_0
(0024E8B0) Vcl::Controls::TWinControl::MainWndProc
(0037322C) System::Classes::_18201
(00015

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 5.9.4

Error message:
Invalid access to memory.

Stack trace:
(00037910) ntdll.dll.RtlInitUnicodeStringEx
(00866B5E) C5073_0
(00868BC6) ____ExceptionHandler
(00865980) __ExceptionHandler
(0007C53F) ntdll.dll
(00069D8A) ntdll.dll.KiUserExceptionDispatcher
(0003795E) ntdll.dll.RtlDosPathNameToRelativeNtPathName_U_WithStatus
(000ABAD0) KERNELBASE.dll.GetFileAttributesExW
(003BEBF2) System::Sysutils::_16838
(003BED0E) System::Sysutils::FileAge
(0006388A) TEditorManager::FileClosed
(007B944E) TEditorForm::FormClose
(0024F269) Vcl::Controls::TWinControl::WndProc
(00209718) Vcl::Forms::TCustomForm::WndProc
(0080C348) Vclcommon::C2754_0
(0024E8B0) Vcl::Controls::TWinControl::MainWndProc
(0037322C) System::Classes::_18201
(00033921) USER32.dll
(0001378B) USER32.dll
(0001336B) USER32.dll
(0001A177) USER32.dll
(00069D64) ntdll.dll.KiUserCallbackDispatcher
(000113B5) USER32.dll
(000272EC) UXTHEME.DLL
(00027140) UXTHEME.DLL
(00026BB8) UXTHEME.DLL
(000258D3) UXTHEME.DLL
(00011B64) USER32.dll
(00033921) USER32.dll
(0001378B) USER32.dll
(00013522) USER32.dll.CallWindowProcW
(0024F37A) Vcl::Controls::TWinControl::DefaultHandler
(0020CAFD) Vcl::Forms::TCustomForm::WMSysCommand
(0024F269) Vcl::Controls::TWinControl::WndProc
(00209718) Vcl::Forms::TCustomForm::WndProc
(0080C348) Vclcommon::C2754_0
(0024E8B0) Vcl::Controls::TWinControl::MainWndProc
(0037322C) System::Classes::_18201
(00033921) USER32.dll
(0001378B) USER3

The problem happens rarely. I cannot reproduce it.