Copying files from remote side failed - TScpCommanderForm::FileOperationProgress

<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:
Copying files from remote side failed.

Out of memory

Stack trace:
(003E7A80) System::DynArraySetLength
(003E7A80) System::DynArraySetLength
(003E7BB1) System::DynArraySetLength
(0035A243) System::Classes::TStringList::AddObject
(00042E33) TScpCommanderForm::FileOperationProgress
(00007F7A) TCustomScpExplorerForm::OperationProgress
(00773005) TTerminal::DoProgress
(00694A68) TFileOperationProgressType::SetFile
(0076384E) TSFTPFileSystem::SFTPSink
(00763302) TSFTPFileSystem::SFTPSinkRobust
(00768DD9) TSFTPFileSystem::SFTPSinkFile
(00778961) TTerminal::ProcessDirectory
(00763EC3) TSFTPFileSystem::SFTPSink
(00763302) TSFTPFileSystem::SFTPSinkRobust
(007630F6) TSFTPFileSystem::CopyToLocal
(00787EBD) TTerminal::CopyToLocal
(0000DDD1) TCustomScpExplorerForm::ExecuteFileOperation
(0000EAB8) TCustomScpExplorerForm::ExecuteFileOperation
(0001D87F) TCustomScpExplorerForm::RemoteFileControlFileOperation
(0001DBDC) TCustomScpExplorerForm::RemoteFileControlDDEnd
(00409222) Customdirview::TCustomDirView::DDDragDetect
(006563C2) TUnixDirView::DDDragDetect
(00405684) Customdirview::TCustomDirView::CNNotify
(0024A725) Vcl::Controls::TControl::WndProc
(0024F269) Vcl::Controls::TWinControl::WndProc
(00293197) Vcl::Comctrls::TCustomListView::WndProc
(0024F3CF) Vcl::Controls::_17076
(0024F269) Vcl::Controls::TWinControl::WndProc
(0024E8B0) Vcl::Controls::TWinControl::MainWndProc
(0037322C) System::Classes::_18201
(000152F7) USER32.dll
%

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 5.19

Error message:
Dosyalar uzak panodan kopyalanamadı.

Out of memory

Yığın izleme:
(0043DD10) System::DynArraySetLength
(0043DD10) System::DynArraySetLength
(0043DE41) System::DynArraySetLength
(003AE797) System::Classes::TStringList::AddObject
(0005329B) TScpCommanderForm::FileOperationProgress
(0000A072) TCustomScpExplorerForm::OperationProgress
(000B21EE) TTerminalManager::OperationProgress
(00CAE94D) TFileOperationProgressType::SetFile
(00DDB7B0) TTerminal::Sink
(00DDB384) TTerminal::SinkRobust
(00DDCBBB) TTerminal::SinkFile
(00DC5CEA) TTerminal::ProcessDirectory
(00DDBD74) TTerminal::Sink
(00DDB384) TTerminal::SinkRobust
(00DDCBBB) TTerminal::SinkFile
(00DC5CEA) TTerminal::ProcessDirectory
(00DDBD74) TTerminal::Sink
(00DDB384) TTerminal::SinkRobust
(00DDCBBB) TTerminal::SinkFile
(00DC5CEA) TTerminal::ProcessDirectory
(00DDBD74) TTerminal::Sink
(00DDB384) TTerminal::SinkRobust
(00DDCBBB) TTerminal::SinkFile
(00DC5CEA) TTerminal::ProcessDirectory
(00DDBD74) TTerminal::Sink
(00DDB384) TTerminal::SinkRobust
(00DDCBBB) TTerminal::SinkFile
(00DC5CEA) TTerminal::ProcessDirectory
(00DDBD74) TTerminal::Sink
(00DDB384) TTerminal::SinkRobust
(00DDB1AC) TTerminal::DoCopyToLocal
(00DAB63A) TSFTPFileSystem::CopyToLocal
(00DDACF8) TTerminal::CopyToLocal
(0001019C) TCustomScpExplorerForm::ExecuteCopyMoveFileOperation
(00010C88) TCustomScpExplorerForm::ExecuteFileOperation
(00010E79) TCustomScpExplorerForm::E

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)>
FTP Transfer of a large number of small files fails with this error after running 3+ days.
The log file is huge and I can't find a text editor that will even open it. I am wondering if that was the cause?

WinSCP 5.21.5

Error message:
Copying files from remote side failed.

Out of memory

Stack trace:
(004400E4) System::DynArraySetLength
(004400E4) System::DynArraySetLength
(00440215) System::DynArraySetLength
(003B0B6B) System::Classes::TStringList::AddObject
(000546B2) TScpCommanderForm::FileOperationProgress
(0000AD1E) TCustomScpExplorerForm::OperationProgress
(000B529A) TTerminalManager::OperationProgress
(00CC4F67) TFileOperationProgressType::SetFile
(00DF8134) TTerminal::Sink
(00DF7D04) TTerminal::SinkRobust
(00DF9543) TTerminal::SinkFile
(00DE26B6) TTerminal::ProcessDirectory
(00DF86F8) TTerminal::Sink
(00DF7D04) TTerminal::SinkRobust
(00DF9543) TTerminal::SinkFile
(00DE26B6) TTerminal::ProcessDirectory
(00DF86F8) TTerminal::Sink
(00DF7D04) TTerminal::SinkRobust
(00DF7B2C) TTerminal::DoCopyToLocal
(00CD17FB) TFTPFileSystem::CopyToLocal
(00DF7678) TTerminal::CopyToLocal
(00010E1A) TCustomScpExplorerForm::ExecuteCopyMoveFileOperation
(00011908) TCustomScpExplorerForm::ExecuteFileOperation
(00011B41) TCustomScpExplorerForm::ExecuteFileOperation
(00024087) TCustomScpExplorerForm::RemoteFileControlFileOperation
(000244BD) TCustomScpExplorerForm::RemoteFileControlDDEnd
(0046D082) Customdirview::TCustomDirView::DDDragDetect
(00C7AFEE) TUnixDirView::DDDragDetect
(0046929A) Customdirview::TCustomDirView::CNNotify
(0027D945) Vcl::Controls::TControl::WndProc
(00282489) Vcl::Controls::TWinControl::WndProc
(002C5763) Vcl::Comctrls::TCustomListView::WndProc
(002825EF) Vcl::Controls::_17076
(00282489) Vcl::Controls::TWinControl::WndProc
(00281AD0) Vcl::Controls::TWinControl::MainWndProc
(003C9C0C) System::Classes::_18201
(00040379) USER32.dll
(00037335) USER32.dll
(00036F25) USER32.dll
(0003AAFD) USER32.dll
(00073FBB) ntdll.dll.KiUserCallbackDispatcher
(00034D4A) USER32.dll.SendMessageW
(00068881) COMCTL32.DLL
(0019EF20) COMCTL32.DLL
(000A3C35) COMCTL32.DLL
(000648A2) COMCTL32.DLL
(00040379) USER32.dll
(00037335) USER32.dll
(00036A02) USER32.dll
(00034BA6) USER32.dll.CallWindowProcW
(0028259A) Vcl::Controls::TWinControl::DefaultHandler
(0046ACDE) Customdirview::TCustomDirView::WMLButtonDown
(00282489) Vcl::Controls::TWinControl::WndProc
(002C5763) Vcl::Comctrls::TCustomListView::WndProc
(003C9C0C) System::Classes::_18201
(00040379) USER32.dll
(00037335) USER32.dll
(00036A02) USER32.dll
(00034BA6) USER32.dll.CallWindowProcW
(00079E57) COMCTL32.DLL
(00079EF6) COMCTL32.DLL
(00079CAC) COMCTL32.DLL
(00040379) USER32.dll
(00037335) USER32.dll
(00036A02) USER32.dll
(00034BA6) USER32.dll.CallWindowProcW
(004A18CB) Dragdrop::TDragDrop::WndMethod
(003C9C0C) System::Classes::_18201
(00040379) USER32.dll
(00037335) USER32.dll
(00035095) USER32.dll
(00034E5B) USER32.dll.DispatchMessageW

(00FDCED9) C5412_0
(00FDE4B3) _ReThrowException
(00DDC2F7) TTerminal::DoProgress
(00CC4F67) TFileOperationProgressType::SetFile
(00DF8134) TTerminal::Sink

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.

@andy.rhine: Thanks for your report.
How many files did you transfer before the error occurred?