Invalid access to memory - TTreeNode::Delete

I was copying a file from remote server to a USB 3.0 external hdd. I have detached the drive (forgot the copy was in progress),

WinSCP 5.6

Error message:
Invalid access to memory.
Stack trace:
[00EE8768] Vcl::Comctrls::TTreeNode::Delete
[76F4B3EA] ntdll.dll
[76F0012E] ntdll.dll.KiUserExceptionDispatcher
[01085E7B] Driveview::TDriveView::InternalWndProc
[00FD8E70] System::Classes::_18201
[763162F7] USER32.dll
[76316D35] USER32.dll
[763177BF] USER32.dll
[76317885] USER32.dll.DispatchMessageW

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

<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 5.7.2

Error message:
Invalid access to memory.

Stack trace:
(0024F004) Vcl::Comctrls::TTreeNode::Delete
(0005A60A) ntdll.dll
(0000F12E) ntdll.dll.KiUserExceptionDispatcher
(003EC1AF) Driveview::TDriveView::InternalWndProc
(0033F8EC) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167BF) USER32.dll
(00016885) USER32.dll.DispatchMessageW

Thanks for your report.
I have sent you an email with a debug version of WinSCP to 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 5.7.2

Error message:
Invalid access to memory.

Stack trace:
(0024F004) Vcl::Comctrls::TTreeNode::Delete
(0003F07E) ntdll.dll.ZwWow64CallFunction64
(0003F7FA) ntdll.dll.KiUserExceptionDispatcher
(003EC1AF) Driveview::TDriveView::InternalWndProc
(0033F8EC) System::Classes::_18201
(00007E6F) USER32.DLL.CallNextHookEx
(000080CC) USER32.DLL
(0000966A) USER32.DLL
(000096DB) USER32.DLL.DispatchMessageW

Thanks for your report.
I have sent you an email with a debug version of WinSCP to 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 5.7.5

Error message:
Invalid access to memory.

Stack trace:
(0024F934) Vcl::Comctrls::TTreeNode::Delete
(00046286) ntdll.dll.RtlRaiseStatus
(00046112) ntdll.dll.KiUserExceptionDispatcher
(003ECB2F) Driveview::TDriveView::InternalWndProc
(0034021C) System::Classes::_18201
(0001B4E4) USER32.dll
(0001B5E2) USER32.dll
(0001BC14) USER32.dll
(0001BC6B) 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 5.7.6

Error message:
Invalid access to memory.

Stack trace:
(0024F950) Vcl::Comctrls::TTreeNode::Delete
(0005A5DA) ntdll.dll
(0000F12E) ntdll.dll.KiUserExceptionDispatcher
(003ECB6B) Driveview::TDriveView::InternalWndProc
(003402A8) 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 5.7.6

Error message:
Invalid access to memory.

Stack trace:
(0024F950) Vcl::Comctrls::TTreeNode::Delete
(0008A9AF) ntdll.dll
(00077F5A) ntdll.dll.KiUserExceptionDispatcher
(003ECB6B) Driveview::TDriveView::InternalWndProc
(003402A8) System::Classes::_18201
(000374E1) USER32.dll
(00015C2B) USER32.dll
(0001552C) USER32.dll
(000152EB) 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 5.7.6

Error message:
Invalid access to memory.

Stack trace:
(0024F950) Vcl::Comctrls::TTreeNode::Delete
(0007C53F) ntdll.dll
(00069D7A) ntdll.dll.KiUserExceptionDispatcher
(003ECB6B) Driveview::TDriveView::InternalWndProc
(003402A8) System::Classes::_18201
(00033921) USER32.dll
(0001378B) USER32.dll
(0001308C) USER32.dll
(00012E4B) 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 5.7.6

Error message:
Invalid access to memory.

Stack trace:
(0024F950) Vcl::Comctrls::TTreeNode::Delete
(0008A61F) ntdll.dll
(00077E7A) ntdll.dll.KiUserExceptionDispatcher
(003ECB6B) Driveview::TDriveView::InternalWndProc
(003402A8) System::Classes::_18201
(000374F1) USER32.dll
(00015C3B) USER32.dll
(0001553C) USER32.dll
(000152FB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

Have WinSCP use a source directory (left hand side) of a USB stick.
Attach the USB stick as a pass-through in Virtual Box to a Windows guest (ie, connect the USB to the Guest using VB control in the lower-right hand corner - this makes it unavailable to the host operating system).


WinSCP 5.7.7

Error message:
Invalid access to memory.

Stack trace:
(0024FC44) Vcl::Comctrls::TTreeNode::Delete
(00062496) ntdll.dll
(0000F13E) ntdll.dll.KiUserExceptionDispatcher
(003ECE5F) Driveview::TDriveView::InternalWndProc
(0034059C) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167CE) USER32.dll
(00016895) USER32.dll.DispatchMessageW
(0003BE08) USER32.dll
(0003BF67) USER32.dll
(0003BE95) USER32.dll.DialogBoxIndirectParamAorW
(0003BC19) USER32.dll.DialogBoxIndirectParamW
(0007C4FE) COMCTL32.DLL
(0007C48F) COMCTL32.DLL
(002FDB36) Winapi::Commctrl::TaskDialogIndirect
(0020329D) Vcl::Dialogs::TCustomTaskDialog::DoExecute
(002035A5) Vcl::Dialogs::TCustomTaskDialog::Execute
(00204E76) Vcl::Dialogs::_16828
(0020482A) Vcl::Dialogs::MessageDlgPosHelp
(003EDE1A) Driveview::TDriveView::CanChange
(0025328A) 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
(000152F7) USER32.dll
(00015D35) USER32.dll
(00015DE8) USER32.dll
(00015E49) USER32.dll
(0000F117) ntdll.dll.KiUserCallbackDispatcher
(000186D0) USER32.dll.SendMessageW
(0002B06D) COMCTL32.DLL
(000A846F) COMCTL32.DLL
(000A773B)%2

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.

I'm sending you an email with a development version of WinSCP to the address you have used to register on this forum.

This bug is being tracked already:
https://winscp.net/tracker/1418

<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:
Érvénytelen memóriaelérés

Veremkivonat:
(0028F010) Vcl::Comctrls::TTreeNode::Delete
(0003EF0E) ntdll.dll.ZwWow64CallFunction64
(0003F68A) ntdll.dll.KiUserExceptionDispatcher
(00432849) Driveview::TDriveView::InternalWndProc
(00380D20) System::Classes::_18201
(00007E6F) USER32.dll.CallNextHookEx
(000080CC) USER32.dll
(0000966A) USER32.dll
(000096DB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

had just finished synchronizing local to a remote site.
stepped away from PC for a few minutes, when I came back the crash dialog was on screen.
looks like USB drive I had been using (the "local" directory) had powered down while away from my desk.

WinSCP 5.15.1

Error message:
Invalid access to memory.

Stack trace:
(002AB1F0) Vcl::Comctrls::TTreeNode::Delete
(0008402F) ntdll.dll
(00071931) ntdll.dll.KiUserExceptionDispatcher
(00459433) Driveview::TDriveView::InternalWndProc
(003A346C) System::Classes::_18201
(00045359) USER32.dll
(00036297) USER32.dll
(000353D6) USER32.dll
(000351AB) 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 5.15.5

Error message:
Invalid access to memory.

Stack trace:
(002ABBC8) Vcl::Comctrls::TTreeNode::Delete
(00089BEF) ntdll.dll
(00070AB1) ntdll.dll.KiUserExceptionDispatcher
(00459DD7) Driveview::TDriveView::InternalWndProc
(003A3E44) System::Classes::_18201
(0001D459) USER32.dll
(00027C04) USER32.dll
(0002A533) USER32.dll
(00018467) USER32.dll
(00017FAB) 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)>
Hi, error appeared sever minutes after pluging out pendrive where the files were copied from server. Coying was successfull.
Regards,
WinSCP 5.19.6

Error message:
Nieprawidłowy dostęp do pamięci.

Stack trace:
(002B2DC8) Vcl::Comctrls::TTreeNode::Delete
(0006246E) ntdll.dll
(0000F12E) ntdll.dll.KiUserExceptionDispatcher
(0047DAD7) Driveview::TDriveView::InternalWndProc
(003C7B64) System::Classes::_18201
(00015307) USER32.dll
(00015D45) USER32.dll
(000167D2) USER32.dll
(00016895) 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 5.21.7

Error message:
Unzulässiger Zugriff auf einen Speicherbereich.

Stapelverfolgung:
(002B4EA4) Vcl::Comctrls::TTreeNode::Delete
(00087B7F) ntdll.dll
(00074001) ntdll.dll.KiUserExceptionDispatcher
(004803D1) Driveview::TDriveView::InternalWndProc
(003C9C40) System::Classes::_18201
(00040239) USER32.dll
(000371F5) USER32.dll
(00034F65) USER32.dll
(00034D2B) 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 6.1.1

Error message:
Invalid access to memory.

Stack trace:
(00428CC4) Vcl::Comctrls::TTreeNode::Delete
(000624F6) ntdll.dll
(0000F13E) ntdll.dll.KiUserExceptionDispatcher
(0048F1B1) Driveview::TDriveView::InternalWndProc
(00214D98) 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 6.3.1

Error message:
Invalid access to memory.

Stack trace:
(0043B420) Vcl::Comctrls::TTreeNode::Delete
(00087B9F) ntdll.dll
(00074121) ntdll.dll.KiUserExceptionDispatcher
(004A1A9D) Driveview::TDriveView::InternalWndProc
(00226760) System::Classes::_18201
(00040999) USER32.dll
(00036DB5) USER32.dll
(000356EC) USER32.dll
(0003520B) 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 6.3.5

Error message:
Invalid access to memory.

Stack trace:
(0043B9E4) Vcl::Comctrls::TTreeNode::Delete
(00087FFF) ntdll.dll
(00074531) ntdll.dll.KiUserExceptionDispatcher
(004A1F05) Driveview::TDriveView::InternalWndProc
(00226F2C) System::Classes::_18201
(00040739) USER32.dll
(00036EA5) USER32.dll
(000357DC) USER32.dll
(000352FB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.