I'd be thankful if someone could get to the bottom of this crap.

00529A14 happens on my end when I remove or don't have [Header]>NumberStartingPoints=0 on any singleplayer map.

Even the original RA2 missions that I can now launch (and the YR missions) via Ares DLL refuse to to work without it.

The YR missions already have [Header]>NumberStartingPoints=0, so the bug doesn't happen with them on my end unless I actually remove that line. When I do I get 00529A14.
I've already chked [Basic]>MultiplayerOnly=. It's 0 on all singleplayer maps.

This crash happens with Ares+Phobos, or even just Ares on my end.

I'd test with YR, but for some reason it sends me back to singleplayer menu instead of launching a mission. No idea what's screwed there at the moment, but must be related to busted mission progression that I've tried fixing with battle/mission/mapsel to no avail.

This bug does not occur in RA2. The RA2 mission maps don't even have a [Header]!