@info: 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 5.19.6

Error message:
Out of memory

Stapelverfolgung:
(00439C06)
(00439C06)
(00E828FB)
(00E44181)
(000F4A1F)
(000F5290)
(000F540A)
(000F6F58)
(000C2C94)
(000C20C8)
(00002658)
(00FC2C59)
(00066A7C)ntdll.dll
(00066A49)ntdll.dll

Status: unknown_rel_addr

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.