Invalid access to memory - System::UnicodeString::IsDelimiter1

Below is the error message received when trying to download a zip file. Unable to download any zip files.

[img]

WinSCP 6.3.4

Error message:
Invalid access to memory.

Stack trace:
(002A3BEB) System::SysFreeMem
(00E22DAE) C6612_0
(00E24E16) ____ExceptionHandler
(00E21BD0) __ExceptionHandler
(00087FFF) ntdll.dll
(00074531) ntdll.dll.KiUserExceptionDispatcher
(00121913) System::UnicodeString::IsDelimiter1
(00B7F167) UnixIncludeTrailingBackslash
(00B890FE) TRemoteFileList::GetFullDirectory
(00B88B7C) TRemoteFile::GetFullFileName
(00B84FAD) TRemoteFile::Duplicate
(00B88F0E) TRemoteFileList::CloneStrings
(00011FB9) TCustomScpExplorerForm::ExecuteCopyMoveFileOperation
(00012B5C) TCustomScpExplorerForm::ExecuteFileOperation
(00012DD8) TCustomScpExplorerForm::ExecuteFileOperation
(00012F97) TCustomScpExplorerForm::ExecuteFileOperationCommand
(0001311E) TCustomScpExplorerForm::ExecuteCopyOperationCommand
(0004F981) TNonVisualDataModule

The problem happens rarely. I cannot reproduce it.

I was attempting to change group ownership & permissions on several directories concurrently ( ; )
WinSCP 6.4.1

Error message:
Invalid access to memory.

Stack trace:
(00135DFE) System::UStrAsg
(00EEC206)
(00EEE27E)
(00EEB028) __ExceptionHandler
(00087F7F) ntdll.dll
(00074501) ntdll.dll.KiUserExceptionDispatcher
(0012BE95) System::UnicodeString::IsDelimiter1
(00C452E3) UnixIncludeTrailingBackslash
(00C4F27A) TRemoteFileList::GetFullDirectory
(00D30F99) TTerminal::FileModified
(00D36683) TTerminal::ChangeFileProperties
(00D3411B) TTerminal::ProcessFiles
(00D3693F) TTerminal::ChangeFilesProperties
(0001B653) TCustomScpExplorerForm::SetProperties
(0001308F) TCustomScpExplorerForm::ExecuteFileOperation
(0001329C) TCustomScpExplorerForm::ExecuteFileOperation
(0001345B) TCustomScpExplorerForm::ExecuteFileOperationCommand
(00050B0D) TNonVisualDataModule::ExplorerActionsExecute
(0021D944) System::Actions::TContainedActionList::ExecuteAction
(00386B4D) Vcl::Actnlist::TCustomAction::Execute
(00200D6C) System::Classes::_18364
(000405F9) USER32.dll
(00036D65) USER32.dll
(0003569C) USER32.dll
(000351BB) USER32.dll.DispatchMessageW

(00135DFE) System::UStrAsg
(00EEC206)
(00EEE27E)
(00EEB028) __ExceptionHandler
(00087F7F) ntdll.dll
(00074501) ntdll.dll.KiUserExceptionDispatcher
(0012BE95) System::UnicodeString::IsDelimiter1
(00C452E3) UnixIncludeTrailingBackslash
(00C4F27A) TRemoteFileList::GetFullDirectory
(00D30F99) TTerminal::FileModified
(00D36683) TTerminal::ChangeFileProperties
(00D3411B) TTerminal::ProcessFiles
(00D3693F) TTerminal::ChangeFilesProperties
(0001B653) TCustomScpExplorerForm::SetProperties
(0001308F) TCustomScpExplorerForm::ExecuteFileOperation
(0001329C) TCustomScpExplorerForm::ExecuteFileOperation
(0001345B) TCustomScpExplorerForm::ExecuteFileOperationCommand
(00050B0D) TNonVisualDataModule::ExplorerActionsExecute
(0021D944) System::Actions::TContainedActionList::ExecuteAction
(00386B4D) Vcl::Actnlist::TCustomAction::Execute
(00200D6C) System::Classes::_18364
(000405F9) USER32.dll
(00036D65) USER32.dll
(0003569C) USER32.dll
(000351BB) USER32.dll.DispatchMessageW

(00EEC871)
(00EEDE4B)
(00D3432D) TTerminal::ProcessFiles
(00D3693F) TTerminal::ChangeFilesProperties
(0001B653) TCustomScpExplorerForm::SetProperties
(0001308F) TCustomScpExplorerForm::ExecuteFileOperation
(0001329C) TCustomScpExplorerForm::ExecuteFileOperation
(0001345B) TCustomScpExplorerForm::ExecuteFileOperationCommand
(00050B0D) TNonVisualDataModule::ExplorerActionsExecute
(0021D944) System::Actions::TContainedActionList::ExecuteAction
(00386B4D) Vcl::Actnlist::TCustomAction::Execute
(00200D6C) System::Classes::_18364
(000405F9) USER32.dll
(00036D65) USER32.dll
(0003569C) USER32.dll
(000351BB) 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 6.3.6

Error message:
Acesso inválido à memória

Rastreamento de pilha:
(002A7F06) System::UStrAsg
(00E24D56) C6612_3
(00E26DBE) ____ExceptionHandler
(00E23B78) __ExceptionHandler
(00087F7F) ntdll.dll
(00074501) ntdll.dll.KiUserExceptionDispatcher
(00121921) System::UnicodeString::IsDelimiter1
(00B80887) UnixIncludeTrailingBackslash
(00B8A81E) TRemoteFileList::GetFullDirectory
(00C67889) TTerminal::FileModified
(00C6F378) TTerminal::DoMoveFile
(00C6F42C) TTerminal::MoveFileW
(00C6A8A7) TTerminal::ProcessFiles
(00C6F4FE) TTerminal::MoveFiles
(0001A45A) TCustomScpExplorerForm::RemoteTransferFiles
(00012C33) TCustomScpExplorerForm::ExecuteFileOperation
(00012DE4) TCustomScpExplorerForm::ExecuteFileOperation
(00012FA3) TCustomScpExplorerForm::ExecuteFileOperationCommand
(0004FC9F) TNonVisualDataModule::ExplorerActionsExecute
(00275814) System::Actions::TContainedActionList::ExecuteAction
(003595F5) Vcl::Actnlist::TCustomAction::Execute
(00226F74) System::Classes::_18201
(00040649) USER32.dll
(00036DB5) USER32.dll
(000356EC) USER32.dll
(0003520B) USER32.dll.DispatchMessageW

(002A7F06) System::UStrAsg
(00E24D56) C6612_3
(00E26DBE) ____ExceptionHandler
(00E23B78) __ExceptionHandler
(00087F7F) ntdll.dll
(00074501) ntdll.dll.KiUserExceptionDispatcher
(00121921) System::UnicodeString::IsDelimiter1
(00B80887) UnixIncludeTrailingBackslash
(00B8A81E) TRemoteFileList::GetFullDirectory
(00C67889) TTerminal::FileModified
(00C6F378) TTerminal::DoMoveFile
(00C6F42C) TTerminal::MoveFileW
(00C6A8A7) TTerminal::ProcessFiles
(00C6F4FE) TTerminal::MoveFiles
(0001A45A) TCustomScpExplorerForm::RemoteTransferFiles
(00012C33) TCustomScpExplorerForm::ExecuteFileOperation
(00012DE4) TCustomScpExplorerForm::ExecuteFileOperation
(00012FA3) TCustomScpExplorerForm::ExecuteFileOperationCommand
(0004FC9F) TNonVisualDataModule::ExplorerActionsExecute
(00275814) System::Actions::TContainedActionList::ExecuteAction
(003595F5) Vcl::Actnlist::TCustomAction::Execute
(00226F74) System::Classes::_18201
(00040649) USER32.dll
(00036DB5) USER32.dll
(000356EC) USER32.dll
(0003520B) USER32.dll.DispatchMessageW

(00E253C1) C6612_3
(00E2699B) _ReThrowException
(00C6AAB9) TTerminal::ProcessFiles
(00C6F4FE) TTerminal::MoveFiles
(0001A45A) TCustomScpExplorerForm::RemoteTransferFiles
(00012C33) TCustomScpExplorerForm::ExecuteFileOperation
(00012DE4) TCustomScpExplorerForm::ExecuteFileOperation
(00012FA3) TCustomScpExplorerForm::ExecuteFileOperationCommand
(0004FC9F) TNonVisualDataModule::ExplorerActionsExecute
(00275814) System::Actions::TContainedActionList::ExecuteAction
(003595F5) Vcl::Actnlist::TCustomAction::Execute
(00226F74) System::Classes::_18201
(00040649) USER32.dll
(00036DB5) USER32.dll
(000356EC) USER32.dll
(0003520B) USER32.dll.DispatchMessageW

(00E247D2) __DynamicCastVCLptr
(00E24D56) C6612_3
(00E26DBE) ____ExceptionHandler
(00E23B78) __ExceptionHandler
(00087F7F) ntdll.dll
(00074501) ntdll.dll.KiUserExceptionDispatcher%0

The problem happens rarely. I cannot reproduce it.