Invalid access to memory - _ssh2_userauth_set_transport_layer

<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 5.17.5

Error message:
Invalid access to memory.

Stack trace:
(00BF40B0) _ssh2_userauth_set_transport_layer
(00F87C7E) C5296_3
(00F89CE6) ____ExceptionHandler
(00F86AA0) __ExceptionHandler
(0008252F) ntdll.dll
(0007008A) ntdll.dll.KiUserExceptionDispatcher
(00BFF139) _ssh_ppl_free
(00BCDC1E) C2603_0
(00BCDD11) _run_toplevel_callbacks
(00D076F8) TSecureShell::EventSelectLoop
(00D065DB) TSecureShell::WaitForData
(00D01599) TSecureShell::Init
(00D00ED9) TSecureShell::Open
(00D50A13) TSFTPFileSystem::Open
(00D8AFE3) TTerminal::Reopen
(00D8D48D) TTerminal::QueryReopen
(00D83D11) TRobustOperationLoop::TryReopen
(00DA864C) TTerminal::SinkRobust
(00DA8428) TTerminal::DoCopyToLocal
(00D7AD8E) TSFTPFileSystem::CopyToLocal
(00DA7F73) TTerminal::CopyToLocal
(0000FD70) TCustomScpExplorerForm::ExecuteCopyMoveFileOperation
(00010848) TCustomScpExplorerForm::ExecuteFileOperation
(00010A39) TCustomScpExplorerForm::ExecuteFileOperation
(0002292F) TCustomScpExplorerForm::RemoteFileControlFileOperation
(00022D65) TCustomScpExplorerForm::RemoteFileControlDDEnd
(00447A3E) Customdirview::TCustomDirView::DDDragDetect
(00C3CA82) TUnixDirView::DDDragDetect
(00443C52) Customdirview::TCustomDirView::CNNotify
(00275301) Vcl::Controls::TControl::WndProc
(00279E45) Vcl::Controls::TWinControl::WndProc
(002BD11F) Vcl::Comctrls::TCustomListView::WndProc
(00279FAB) Vcl::Controls::_17076
(00279E45) Vcl::Controls::TWinControl::WndProc
(0027948C) Vcl::Controls::TWinControl::Main

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 5.17.6

Error message:
Invalid access to memory.

Stack trace:
(00F87E4E) C5296_0
(00F89EB6) ____ExceptionHandler
(00F86C70) __ExceptionHandler
(00087E3F) ntdll.dll
(000732D1) ntdll.dll.KiUserExceptionDispatcher
(00000638) krb5_32.dll
(00001A28) krb5_32.dll.krb5_cc_resolve
(0006A9A2) krb5_32.dll.krb5_cc_default
(0006AAA8) krb5_32.dll.krb5int_cc_default
(00016845) gssapi32.dll.gss_acquire_cred_with_password
(0001E49A) gssapi32.dll.gss_acquire_cred_with_password
(0001E79E) gssapi32.dll.gss_acquire_cred_with_password
(00010437) gssapi32.dll.gss_inquire_cred_by_mech
(00C1B10A) C2699_0
(00BF5C99) _ssh2_userauth_set_transport_layer
(00BFF161) _ssh_ppl_free
(00BCDC46) C2603_0
(00BCDD39) _run_toplevel_callbacks
(00D077A8) TSecureShell::EventSelectLoop
(00D0668B) TSecureShell::WaitForData
(00D01649) TSecureShell::Init
(00D00F89) TSecureShell::Open
(00D89181) TTerminal::Open
(00CC0A93) TTerminalThread::TerminalOpenEvent
(00CBB9F0) TSignalThread::Execute
(000BC29B) Userinterface::C20_0
(00015357) KERNEL32.DLL.BaseThreadInitThunk
(00066C22) ntdll.dll.RtlGetAppContainerNamedObjectPath
(00066BEF) ntdll.dll.RtlGetAppContainerNamedObjectPath
Authentication log (see session log for details):
Using username "dvasvc02".

Authentication failed.

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 5.17.6

Error message:
Invalid access to memory.

Stack trace:
(00F87E4E) C5296_0
(00F89EB6) ____ExceptionHandler
(00F86C70) __ExceptionHandler
(00087E3F) ntdll.dll
(000732D1) ntdll.dll.KiUserExceptionDispatcher
(00000638) krb5_32.dll
(00001A28) krb5_32.dll.krb5_cc_resolve
(0006A9A2) krb5_32.dll.krb5_cc_default
(0006AAA8) krb5_32.dll.krb5int_cc_default
(00016845) gssapi32.dll.gss_acquire_cred_with_password
(0001E49A) gssapi32.dll.gss_acquire_cred_with_password
(0001E79E) gssapi32.dll.gss_acquire_cred_with_password
(00010437) gssapi32.dll.gss_inquire_cred_by_mech
(00C1B10A) C2699_0
(00BF5C99) _ssh2_userauth_set_transport_layer
(00BFF161) _ssh_ppl_free
(00BCDC46) C2603_0
(00BCDD39) _run_toplevel_callbacks
(00D077A8) TSecureShell::EventSelectLoop
(00D0668B) TSecureShell::WaitForData
(00D01649) TSecureShell::Init
(00D00F89) TSecureShell::Open
(00D89181) TTerminal::Open
(00CC0A93) TTerminalThread::TerminalOpenEvent
(00CBB9F0) TSignalThread::Execute
(000BC29B) Userinterface::C20_0
(00015357) KERNEL32.DLL.BaseThreadInitThunk
(00066C22) ntdll.dll.RtlGetAppContainerNamedObjectPath
(00066BEF) ntdll.dll.RtlGetAppContainerNamedObjectPath
Authentication log (see session log for details):
Using username "chliang".
WARNING ** CAUTION ** WARNING ** CAUTION ** WARNING ** CAUTION

You are accessing a U.S. Government (USG) information system (IS) that is
provided for USG-authorized use only.

By using this IS (which includes any device attached to this IS), you consent
to the following conditions:

-The USG routinely intercepts and monitors communications occurring on this IS
for purposes including, but not limited to, penetration testing, COMSEC
monitoring, network operations and defense, personnel misconduct (PM),
law enforcement (LE), and counterintelligence (CI) investigations.
-At any time, the USG may inspect and seize data stored on this IS.
-Communications using, or data stored on, this IS are not private, are subject
to routine monitoring, interception, and search, and may be disclosed or used
for any USG-authorized purpose.
-This IS includes security measures (e.g., authentication and access controls)
to protect USG interests--not for your personal benefit or privacy.
-Notwithstanding the above, using this IS does not constitute consent to PM,
LE or CI investigative searching or monitoring of the content of privileged
communications, or work product, related to personal representation or services
by attorneys, psychotherapists, or clergy, and their assistants. Such
communications and work product are private and confidential. See User
Agreement for details.

WARNING ** CAUTION ** WARNING ** CAUTION ** WARNING ** CAUTION

Authentication failed.

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 5.17.6

Error message:
Invalid access to memory.

Stack trace:
(00BF6AF9) _ssh2_userauth_set_transport_layer
(00F87E4E) C5296_0
(00F89EB6) ____ExceptionHandler
(00F86C70) __ExceptionHandler
(00081D0F) ntdll.dll
(0006F88A) ntdll.dll.KiUserExceptionDispatcher
(00BFF161) _ssh_ppl_free
(00BCDC46) C2603_0
(00BCDD39) _run_toplevel_callbacks
(00D077A8) TSecureShell::EventSelectLoop
(00D0668B) TSecureShell::WaitForData
(00D01649) TSecureShell::Init
(00D00F89) TSecureShell::Open
(00D50AC3) TSFTPFileSystem::Open
(00D8B093) TTerminal::Reopen
(00CC0AA1) TTerminalThread::TerminalReopenEvent
(00CBB9F0) TSignalThread::Execute
(000BC29B) Userinterface::C20_0
(000152C2) KERNEL32.DLL.BaseThreadInitThunk
(0005FF77) ntdll.dll
(0005FF3F) ntdll.dll
Authentication log (see session log for details):
Using username "root".
Access denied.

Authentication failed.

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 5.17.9

Error message:
Invalid access to memory.

Stack trace:
(00F89F32) C5296_0
(00F8BF9A) ____ExceptionHandler
(00F88D54) __ExceptionHandler
(00088F9F) ntdll.dll
(000741F1) ntdll.dll.KiUserExceptionDispatcher
(00000638) krb5_32.dll
(00001A28) krb5_32.dll.krb5_cc_resolve
(0006A9A2) krb5_32.dll.krb5_cc_default
(0006AAA8) krb5_32.dll.krb5int_cc_default
(00016845) gssapi32.dll.gss_acquire_cred_with_password
(0001E49A) gssapi32.dll.gss_acquire_cred_with_password
(0001E79E) gssapi32.dll.gss_acquire_cred_with_password
(00010437) gssapi32.dll.gss_inquire_cred_by_mech
(00C1D35A) C2699_0
(00BF7DBA) _ssh2_userauth_set_transport_layer
(00C013B1) _ssh_ppl_free
(00BCF84E) C2603_0
(00BCF941) _run_toplevel_callbacks
(00D09854) TSecureShell::EventSelectLoop
(00D08737) TSecureShell::WaitForData
(00D036F5) TSecureShell::Init
(00D03035) TSecureShell::Open
(00D8B199) TTerminal::Open
(00CC2B5B) TTerminalThread::TerminalOpenEvent
(00CBDAB8) TSignalThread::Execute
(000BCFFB) Userinterface::C20_0
(00015357) KERNEL32.DLL.BaseThreadInitThunk
(000677A2) ntdll.dll.RtlGetAppContainerNamedObjectPath
(0006776F) ntdll.dll.RtlGetAppContainerNamedObjectPath
Authentication log (see session log for details):
Using username "******".

Authentication failed.

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 5.19.2

Error message:
Accès mémoire invalide.

Trace de la pile :
(00039D3A) ntdll.dll.RtlFreeHeap
(00FBC612) C5294_3
(00FBE67A) ____ExceptionHandler
(00FBB434) __ExceptionHandler
(0008542F) ntdll.dll
(000729E1) ntdll.dll.KiUserExceptionDispatcher
(00062C15) MSVCR90.dll.free
(000063A2) krbcc32.dll.cc_free_NC_info
(00006331) krbcc32.dll.cc_free_NC_info
(00002FC1) krbcc32.dll.cc_initialize
(00000A52) krb5_32.dll
(0000D29D) krb5_32.dll.krb5_cc_next_cred
(0000907C) leashw32.dll.not_an_API_Leash_AcquireInitialTicketsIfNeeded
(00008FED) leashw32.dll.not_an_API_Leash_AcquireInitialTicketsIfNeeded
(0000868F) leashw32.dll.not_an_API_Leash_AcquireInitialTicketsIfNeeded
(00008563) leashw32.dll.not_an_API_Leash_AcquireInitialTicketsIfNeeded
(0006AA50) krb5_32.dll.krb5int_cc_default
(00016845) gssapi32.dll.gss_acquire_cred_with_password
(0001E49A) gssapi32.dll.gss_acquire_cred_with_password
(0001E79E) gssapi32.dll.gss_acquire_cred_with_password
(00010437) gssapi32.dll.gss_inquire_cred_by_mech
(00C45DD2) C2697_0
(00C1C69E) _ssh2_userauth_set_transport_layer
(00C29D4D) _ssh_ppl_free
(00BF3C76) C2597_0
(00BF3D69) _run_toplevel_callbacks
(00D35974) TSecureShell::EventSelectLoop
(00D34857) TSecureShell::WaitForData
(00D2F585) TSecureShell::Init
(00D2EEC5) TSecureShell::Open
(00DBA6D9) TTerminal::Open
(00CEFA2F) TTerminalThread::TerminalOpenEvent
(00CEA89C) TSignalThread::Execute
(000C16E3) Userinterface::C20_0
(0001F417) KERNEL32.DLL.BaseThreadInitThunk
(000662EB) ntdll.dll.RtlGetAppContainerNamedObjectPath
(000662B8) ntdll.dll.RtlGetAppContainerNamedObjectPath
Log d'authentification (voir le log de session pour les détails) :
Utilisation du nom d'utilisateur "u_gs0131".

Erreur d'authentification

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.

@jean-luc.lemonnier: 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.

I was reconnecting after a lost connection. Initial password was wrong. Second try was good.

WinSCP 5.17.10

Error message:
Invalid access to memory.

Stack trace:
(00BF8E60) _ssh2_userauth_set_transport_layer
(00F8A13A) C5296_0
(00F8C1A2) ____ExceptionHandler
(00F88F5C) __ExceptionHandler
(00088F9F) ntdll.dll
(000741F1) ntdll.dll.KiUserExceptionDispatcher
(00C01529) _ssh_ppl_free
(00BCF9C6) C2603_0
(00BCFAB9) _run_toplevel_callbacks
(00D099CC) TSecureShell::EventSelectLoop
(00D088AF) TSecureShell::WaitForData
(00D0386D) TSecureShell::Init
(00D031AD) TSecureShell::Open
(00D52CE7) TSFTPFileSystem::Open
(00D8D2C3) TTerminal::Reopen
(00CC2CE1) TTerminalThread::TerminalReopenEvent
(00CBDC30) TSignalThread::Execute
(000BCFFF) Userinterface::C20_0
(00015357) KERNEL32.DLL.BaseThreadInitThunk
(000677A2) ntdll.dll.RtlGetAppContainerNamedObjectPath
(0006776F) ntdll.dll.RtlGetAppContainerNamedObjectPath
Authentication log (see session log for details):
Access denied.

Authentication failed.

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 5.20

Error message:
Invalid access to memory.

Stack trace:
(00FCA816) C5290_3
(00FCC87E) ____ExceptionHandler
(00FC9638) __ExceptionHandler
(000878AF) ntdll.dll
(00073EE1) ntdll.dll.KiUserExceptionDispatcher
(00000638) krb5_32.dll
(00001A28) krb5_32.dll.krb5_cc_resolve
(0006A9A2) krb5_32.dll.krb5_cc_default
(0006AAA8) krb5_32.dll.krb5int_cc_default
(00016845) gssapi32.dll.gss_acquire_cred_with_password
(0001E49A) gssapi32.dll.gss_acquire_cred_with_password
(0001E79E) gssapi32.dll.gss_acquire_cred_with_password
(00010437) gssapi32.dll.gss_inquire_cred_by_mech
(00C475C2) C2683_0
(00C20222) _ssh2_userauth_set_transport_layer
(00C2B479) _ssh_ppl_free
(00BFBDC6) C2597_0
(00BFBEB9) _run_toplevel_callbacks
(00D3E18D) TSecureShell::EventSelectLoop
(00D3D0DF) TSecureShell::WaitForData
(00D37DBD) TSecureShell::Init
(00D376FE) TSecureShell::Open
(00DC562D) TTerminal::Open
(00CF4543) TTerminalThread::TerminalOpenEvent
(00CEF3B0) TSignalThread::Execute
(000C0817) Userinterface::C20_0
(0001EA27) KERNEL32.DLL.BaseThreadInitThunk
(00066A9C) ntdll.dll.RtlGetAppContainerNamedObjectPath
(00066A69) ntdll.dll.RtlGetAppContainerNamedObjectPath
Authentication log (see session log for details):
Using username "tamer".

Authentication failed.

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.

@tamer.elkafrawy: 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 5.19.5

Error message:
Invalid access to memory.

Stack trace:
(00FC4482) C5294_3
(00FC64EA) ____ExceptionHandler
(00FC32A4) __ExceptionHandler
(000878AF) ntdll.dll
(00073EE1) ntdll.dll.KiUserExceptionDispatcher
(00000638) krb5_32.dll
(00001A6D) krb5_32.dll.krb5_cc_resolve
(000672E9) krb5_32.dll.krb5_cc_default
(000673EF) krb5_32.dll.krb5int_cc_default
(0001230C) gssapi32.dll.gss_acquire_cred_with_password
(00017CE5) gssapi32.dll.gss_acquire_cred_with_password
(00017FF2) gssapi32.dll.gss_acquire_cred_with_password
(0000D6DD) gssapi32.dll.gss_inquire_cred_by_mech
(00C4CC52) C2697_0
(00C2351E) _ssh2_userauth_set_transport_layer
(00C30BCD) _ssh_ppl_free
(00BFAAF6) C2597_0
(00BFABE9) _run_toplevel_callbacks
(00D3D27C) TSecureShell::EventSelectLoop
(00D3C15F) TSecureShell::WaitForData
(00D36C15) TSecureShell::Init
(00D36555) TSecureShell::Open
(00DC21C1) TTerminal::Open
(00CF6F83) TTerminalThread::TerminalOpenEvent
(00CF1DF0) TSignalThread::Execute
(000C183B) Userinterface::C20_0
(0001EA27) KERNEL32.DLL.BaseThreadInitThunk
(00066A9C) ntdll.dll.RtlGetAppContainerNamedObjectPath
(00066A69) ntdll.dll.RtlGetAppContainerNamedObjectPath
Authentication log (see session log for details):
Using username "fting1".
******************************************************************************
* WARNING! THIS IS A FORD MOTOR COMPANY PRIVATE COMPUTER SYSTEM. *
* USAGE MAY BE MONITORED. *
* *
* UNAUTHORIZED ACCESS OR USE MAY RESULT IN CRIMINAL OR CIVIL PROSECUTION, *
* DISCIPLINE UP TO AND INCLUDING TERMINATION OF EMPLOYMENT, TERMINATION OF *
* ASSIGNMENT, OR LOSS OF ACCESS. *
* *
* By signing on to the system I agree that, where consistent with *
* applicable law: *
* 1) I understand and will comply with the provisions of Ford Directive *
* B-109, and the other confidentiality policies listed below, *
* 2) I do not have any expectation of privacy in my use of the system, and *
* 3) Ford actively monitors its information, systems, and data to identify *
* and respond to security threats and losses, and any information or *
* data identified through this monitoring may be shared among Ford and *
* For

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.

@fting1: 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.

martin wrote:

@fting1: 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.

I tried to replied your email with the tracelog file, but failed.

<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 5.21.2

Error message:
Invalid access to memory.

Stack trace:
(00C52054) _ssh2_userauth_set_transport_layer
(00FD296E) C5412_0
(00FD49D6) ____ExceptionHandler
(00FD1790) __ExceptionHandler
(000879EF) ntdll.dll
(00073EE1) ntdll.dll.KiUserExceptionDispatcher
(00C40D4D) _ssh_ppl_free
(00C00416) C2593_0
(00C00509) _run_toplevel_callbacks
(00D464A6) TSecureShell::EventSelectLoop
(00D4570B) TSecureShell::WaitForData
(00D40265) TSecureShell::Init
(00D3FBA4) TSecureShell::Open
(00D9474F) TSFTPFileSystem::Open
(00DD0603) TTerminal::Reopen
(00CFC4B9) TTerminalThread::TerminalReopenEvent
(00CF7318) TSignalThread::Execute
(000C3637) Userinterface::C20_0
(0001EA27) KERNEL32.DLL.BaseThreadInitThunk
(00066A9C) ntdll.dll.RtlGetAppContainerNamedObjectPath
(00066A69) ntdll.dll.RtlGetAppContainerNamedObjectPath

(00FD2FD9) C5412_0
(00FD45B3) _ReThrowException
(00D40377) TSecureShell::Init
(00D3FBA4) TSecureShell::Open
(00D9474F) TSFTPFileSystem::Open
(00DD0603) TTerminal::Reopen
(00CFC4B9) TTerminalThread::TerminalReopenEvent
(00CF7318) TSignalThread::Execute
(000C3637) Userinterface::C20_0
(0001EA27) KERNEL32.DLL.BaseThreadInitThunk
(00066A9C) ntdll.dll.RtlGetAppContainerNamedObjectPath
(00066A69) ntdll.dll.RtlGetAppContainerNamedObjectPath
Authentication failed.

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 5.20.1

Error message:
Invalid access to memory.

Stack trace:
(00C1F04C) _ssh2_userauth_set_transport_layer
(00FCC21A) C5290_3
(00FCE282) ____ExceptionHandler
(00FCB03C) __ExceptionHandler
(00087AFF) ntdll.dll
(00073FA1) ntdll.dll.KiUserExceptionDispatcher
(00C2C271) _ssh_ppl_free
(00BFCBBE) C2597_0
(00BFCCB1) _run_toplevel_callbacks
(00D3F875) TSecureShell::EventSelectLoop
(00D3E7C7) TSecureShell::WaitForData
(00D394A5) TSecureShell::Init
(00D38DE6) TSecureShell::Open
(00D8E23F) TSFTPFileSystem::Open
(00DCA093) TTerminal::Reopen
(00DCC761) TTerminal::QueryReopen
(00DC1ABC) TRobustOperationLoop::TryReopen
(00DE5461) TTerminal::SourceRobust
(00DE5279) TTerminal::DoCopyToRemote
(00DB1A8E) TSFTPFileSystem::CopyToRemote
(00DE4CD8) TTerminal::CopyToRemote
(000101A5) TCustomScpExplorerForm::ExecuteCopyMoveFileOperation
(00010DC4) TCustomScpExplorerForm::ExecuteFileOperation
(0002533D) TCustomScpExplorerForm::RemoteFileControlDragDropFileOperation
(000254D5) TCustomScpExplorerForm::RemoteFileControlDDFileOperation
(00C6B2B2) TUnixDirView::PerformItemDragDropOperation
(00469EC8) Customdirview::TCustomDirView::DDProcessDropped
(0049EEAB) Dragdrop::TDragDrop::WndMethod
(003C778C) System::Classes::_18201
(0003FBC9) USER32.dll
(00036B85) USER32.dll
(000348F5) USER32.dll
(000346BB) USER32.dll.DispatchMessageW

(00FCC885) C5290_3
(00FCDE5F) _ReThrowException
(00D395B7) TSecureShell::Init
(00D38DE6) TSecureShell::Open
(00D8E23F) TSFTPFileSystem::Open
(00DCA093) TTerminal::Reopen
(00DCC761) TTerminal::QueryReopen
(00DC1ABC) TRobustOperationLoop::TryReopen
(00DE5461) TTerminal::SourceRobust
(00DE5279) TTerminal::DoCopyToRemote
(00DB1A8E) TSFTPFileSystem::CopyToRemote
(00DE4CD8) TTerminal::CopyToRemote
(000101A5) TCustomScpExplorerForm::ExecuteCopyMoveFileOperation
(00010DC4) TCustomScpExplorerForm::ExecuteFileOperation
(0002533D) TCustomScpExplorerForm::RemoteFileControlDragDropFileOperation
(000254D5) TCustomScpExplorerForm::RemoteFileControlDDFileOperation
(00C6B2B2) TUnixDirView::PerformItemDragDropOperation
(00469EC8) Customdirview::TCustomDirView::DDProcessDropped
(0049EEAB) Dragdrop::TDragDrop::WndMethod
(003C778C) System::Classes::_18201
(0003FBC9) USER32.dll
(00036B85) USER32.dll
(000348F5) USER32.dll
(000346BB) USER32.dll.DispatchMessageW
Authentication failed.

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.

@mkearney: 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 5.21.7

Error message:
Invalid access to memory.

Stack trace:
(0000EEC8) MSVCR100.dll.strchr
(00FDF7C2) C5412_0
(00FE182A) ____ExceptionHandler
(00FDE5E4) __ExceptionHandler
(00087B7F) ntdll.dll
(00074001) ntdll.dll.KiUserExceptionDispatcher
(0006DA36) krb5_32.dll.krb5_kt_client_default
(000179F7) gssapi32.dll.gss_acquire_cred_with_password
(000173EE) gssapi32.dll.gss_acquire_cred_with_password
(00017E62) gssapi32.dll.gss_acquire_cred_with_password
(0000C4EB) gssapi32.dll.gss_add_cred_from
(0000C0CC) gssapi32.dll.gss_acquire_cred_from
(0000BFAB) gssapi32.dll.gss_acquire_cred
(00C4F324) C2704_0
(00C5DEC4) _ssh2_userauth_set_transport_layer
(00C4AB11) _ssh_ppl_free
(00C0A1DA) C2593_0
(00C0A2CD) _run_toplevel_callbacks
(00D5045A) TSecureShell::EventSelectLoop
(00D4F6BF) TSecureShell::WaitForData
(00D4A20D) TSecureShell::Init
(00D49B4C) TSecureShell::Open
(00DD7641) TTerminal::Open
(00D06453) TTerminalThread::TerminalOpenEvent
(00D012C0) TSignalThread::Execute
(000C282F) Userinterface::C20_0
(0001F0F7) KERNEL32.DLL.BaseThreadInitThunk
(00066BBC) ntdll.dll.RtlGetAppContainerNamedObjectPath
(00066B89) ntdll.dll.RtlGetAppContainerNamedObjectPath
Authentication log (see session log for details):
Using username "sapdsfup".

Authentication failed.

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.

<using remote desktop, then connect to a server, then error message appear, it always error from beginning, and the administrator of the remote desktop, have no clue at all>
<screenshot attached>
s
WinSCP 5.21.5

Error message:
Invalid access to memory.

Stack trace:
(0000EEC8) MSVCR100.dll.strchr
(00FDC86E) C5412_0
(00FDE8D6) ____ExceptionHandler
(00FDB690) __ExceptionHandler
(00087B7F) ntdll.dll
(00074001) ntdll.dll.KiUserExceptionDispatcher
(0006DA36) krb5_32.dll.krb5_kt_client_default
(000179F7) gssapi32.dll.gss_acquire_cred_with_password
(000173EE) gssapi32.dll.gss_acquire_cred_with_password
(00017E62) gssapi32.dll.gss_acquire_cred_with_password
(0000C4EB) gssapi32.dll.gss_add_cred_from
(0000C0CC) gssapi32.dll.gss_acquire_cred_from
(0000BFAB) gssapi32.dll.gss_acquire_cred
(00C4F174) C2704_0
(00C5DD14) _ssh2_userauth_set_transport_layer
(00C4A961) _ssh_ppl_free
(00C0A02A) C2593_0
(00C0A11D) _run_toplevel_callbacks
(00D502AA) TSecureShell::EventSelectLoop
(00D4F50F) TSecureShell::WaitForData
(00D4A05D) TSecureShell::Init
(00D4999C) TSecureShell::Open
(00DD7491) TTerminal::Open
(00D062A3) TTerminalThread::TerminalOpenEvent
(00D01110) TSignalThread::Execute
(000C27FB) Userinterface::C20_0
(0001EEF7) KERNEL32.DLL.BaseThreadInitThunk
(00066BBC) ntdll.dll.RtlGetAppContainerNamedObjectPath
(00066B89) ntdll.dll.RtlGetAppContainerNamedObjectPath

(00FDCED9) C5412_0
(00FDE4B3) _ReThrowException
(00D4A16F) TSecureShell::Init
(00D4999C) TSecureShell::Open
(00DD7491) TTerminal::Open
(00D062A3) TTerminalThread::TerminalOpenEvent
(00D01110) TSignalThread::Execute
(000C27FB) Userinterface::C20_0
(0001EEF7) KERNEL32.DLL.BaseThreadInitThunk
(00066BBC) ntdll.dll.RtlGetAppContainerNamedObjectPath
(00066B89) ntdll.dll.RtlGetAppContainerNamedObjectPath
Authentication failed.

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.

@ashish.ranjan and @hendro.sunaryono: Thanks for your reports.
I have sent you an email with a debug version of WinSCP to the addresses 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 5.21.7

Error message:
Invalid access to memory.

Stack trace:
(00CF9FC7) C2940_0
(00FDF7C2) C5412_0
(00FE182A) ____ExceptionHandler
(00FDE5E4) __ExceptionHandler
(00087B7F) ntdll.dll
(00074001) ntdll.dll.KiUserExceptionDispatcher
(00C5EA20) _ssh2_userauth_set_transport_layer
(00C4AB11) _ssh_ppl_free
(00C0A1DA) C2593_0
(00C0A2CD) _run_toplevel_callbacks
(00D5045A) TSecureShell::EventSelectLoop
(00D4F6BF) TSecureShell::WaitForData
(00D4A20D) TSecureShell::Init
(00D49B4C) TSecureShell::Open
(00D9E7DB) TSFTPFileSystem::Open
(00DDA68F) TTerminal::Reopen
(00D06461) TTerminalThread::TerminalReopenEvent
(00D012C0) TSignalThread::Execute
(000C282F) Userinterface::C20_0
(0001F0F7) KERNEL32.DLL.BaseThreadInitThunk
(00066BBC) ntdll.dll.RtlGetAppContainerNamedObjectPath
(00066B89) ntdll.dll.RtlGetAppContainerNamedObjectPath
Authentication log (see session log for details):
Using username "jradmin2399@uslbm.us+analyst_linux_l4_1+azrusepcata01".

Authentication failed.

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 5.21.5

Error message:
Invalid access to memory.

Stack trace:
(00C5BC68) _ssh2_userauth_set_transport_layer
(00FDC86E) C5412_0
(00FDE8D6) ____ExceptionHandler
(00FDB690) __ExceptionHandler
(000878AF) ntdll.dll
(00073EE1) ntdll.dll.KiUserExceptionDispatcher
(00C4A961) _ssh_ppl_free
(00C0A02A) C2593_0
(00C0A11D) _run_toplevel_callbacks
(00D502AA) TSecureShell::EventSelectLoop
(00D4F50F) TSecureShell::WaitForData
(00D4A05D) TSecureShell::Init
(00D4999C) TSecureShell::Open
(00D9E62B) TSFTPFileSystem::Open
(00DDA4DF) TTerminal::Reopen
(00DDCBAD) TTerminal::QueryReopen
(00DD1EA8) TRobustOperationLoop::TryReopen
(00DE1DD7) TTerminal::CustomReadDirectory
(00DE1121) TTerminal::ReadDirectory
(00DDC763) TTerminal::ReactOnCommand
(00C7B225) TUnixDirView::ChangeDirectory
(00C79649) TUnixDirView::ExecuteFile
(0046A18E) Customdirview::TCustomDirView::DoExecute
(0046AD8D) Customdirview::TCustomDirView::WMLButtonDblClk
(00282489) Vcl::Controls::TWinControl::WndProc
(002C5763) Vcl::Comctrls::TCustomListView::WndProc
(003C9C0C) System::Classes::_18201
(00042489) USER32.dll
(00039425) USER32.dll
(00038B02) USER32.dll
(00036CA6) USER32.dll.CallWindowProcW
(00079E57) COMCTL32.DLL
(00079EF6) COMCTL32.DLL
(00079CAC) COMCTL32.DLL
(00042489) USER32.dll
(00039425) USER32.dll
(00038B02) USER32.dll
(00036CA6) USER32.dll.CallWindowProcW
(004A18CB) Dragdrop::TDragDrop::WndMethod
(003C9C0C) System::Classes::_18201
(00042489) USER32.dll
(00039425) USER32.dll
(00037195) USER32.dll
(00036F5B) USER32.dll.DispatchMessageW

(00FDCED9) C5412_0
(00FDE4B3) _ReThrowException
(00D4A16F) TSecureShell::Init
(00D4999C) TSecureShell::Open
(00D9E62B) TSFTPFileSystem::Open
(00DDA4DF) TTerminal::Reopen
(00DDCBAD) TTerminal::QueryReopen
(00DD1EA8) TRobustOperationLoop::TryReopen
(00DE1DD7) TTerminal::CustomReadDirectory
(00DE1121) TTerminal::ReadDirectory
(00DDC763) TTerminal::ReactOnCommand
(00C7B225) TUnixDirView::ChangeDirectory
(00C79649) TUnixDirView::ExecuteFile
(0046A18E) Customdirview::TCustomDirView::DoExecute
(0046AD8D) Customdirview::TCustomDirView::WMLButtonDblClk
(00282489) Vcl::Controls::TWinControl::WndProc
(002C5763) Vcl::Comctrls::TCustomListView::WndProc
(003C9C0C) System::Classes::_18201
(00042489) USER32.dll
(00039425) USER32.dll
(00038B02) USER32.dll
(00036CA6) USER32.dll.CallWindowProcW
(00079E57) COMCTL32.DLL
(00079EF6) COMCTL32.DLL
(00079CAC) COMCTL32.DLL
(00042489) USER32.dll
(00039425) USER32.dll
(00038B02) USER32.dll
(00036CA6) USER32.dll.CallWindowProcW
(004A18CB) Dragdrop::TDragDrop::WndMethod
(003C9C0C) System::Classes::_18201
(00042489) USER32.dll
(00039425) USER32.dll
(00037195) USER32.dll
(00036F5B) USER32.dll.DispatchMessageW
Authentication failed.

The problem happens rarely. I cannot reproduce it.