Sorry, I have no idea how your screenshot of GUI window related to scripting.

Silly me, I didn't read https://winscp.net/eng/docs/scriptcommand_option enough, it's not "option batch", it's "option batch on"

I'm using winscp.com in batch mode (redirecting its stdin and sending "option batch"/"option confirm off"). We were transferring files overnight, there was some kind of network disruption, and when we arrived in the morning we got the attached.

Note that there's a dialog box open, even though we chose option batch.

I thought that option batch would suppress all dialogs