<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:
원격 파일 '/user/xico/XicoTrade/Data/Mapper/Tx/20160922/KIA_20160922030747.xml.frm'를 열 수 없습니다.

메모리 접근이 잘못 되었습니다.

Status: not_matched

The problem happens rarely. I cannot reproduce it.