Looks like the 1 row by XXXX columns raw image that stores the characters composing the survey responses. Eventually it looks like a URL and after it is used as such, is removed from the image list, which normally leaves the list empty. If something interfered with that removal, G'MIC does its default action of -display-ing whatever remains on the list.

Do you recall getting the official Thank you image in the plug-in preview window? There's also a tiny little .*.lock file left in your home directory. These indicate a successful exchange between you and gmic.eu. If you didn't see such, my guess is that the script stopped or was interrupted in some way.

Garry

Na, it is just a '-display' in the survey code that I should have removed.
I was using it to debug the command. I'll check that and remove it. Thanks for reporting