Invalid access to memory - System::DynArrayLength

<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:
(003B3DB4) System::DynArrayLength
(007E0E6E) C4799_3
(007E2ED6) ____ExceptionHandler
(007DFE50) __ExceptionHandler
(0005A67A) ntdll.dll

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 5.9.2

Error message:
無效的存取記憶體

Stack trace:
(003E7354) System::DynArrayLength
(00863846) C5073_3
(008658AE) ____ExceptionHandler
(00862668) __ExceptionHandler
(0003CF4E) ntdll.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 5.9.4

Error message:
메모리 접근이 잘못 되었습니다.

스택 추적:
(003E7994) System::DynArrayLength
(00866B5E) C5073_0
(00868BC6) ____ExceptionHandler
(00865980) __ExceptionHandler
(000624F6) ntdll.dll

The problem happens rarely. I cannot reproduce it.

I'm running Windows 7 Enterprise K in VMware Workstation 12 Player.
Sometimes this error happens. If I try few minutes later, this error disappears.
<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:
(003E7CCC) System::DynArrayLength
(008689AA) C5077_0
(0086AA12) ____ExceptionHandler
(008677CC) __ExceptionHandler
(00062496) ntdll.dll

The problem happens rarely. I cannot reproduce it.