https://bugs.winehq.org/show_bug.cgi?id=52958
--- Comment #2 from martijn@bytehazard.com --- It is definitely not the Windows application triggering it, because I wrote it. The source code doesn't even contain the error messages.
I think it they are produced by the Wine "cmd" or "start" process.
I'm trying to launch a native Linux application via ShellExecute API, which never starts. So it's definitely produced by Wine. Or maybe indirectly if by error some file association is triggered and some other application is invoked, but this is in an otherwise empty prefix (and no visible or invisible Windows process is started in the process either, AFAIK).
I also found these Wine users reporting the exact same error messages: https://forum.winehq.org/viewtopic.php?t=17941 https://forum.winehq.org/viewtopic.php?t=11946
I'll try searching the Wine source code to find out what component this is related to.
Thanks!