I don't think it was nexus that had the problem, I have a bunch of aliases, and it has completly locked up on me, and some of them are more complex than just NATURE CURSE $TAR. Don't know what caused your problem, maybe just a bad connection? Or does amnesia not tell you when you fail to do something?

But as to the thing, you may want to have it wait a very small amount of time (to get info back from lusternia) and then have the actual curing go through a seperate alias, cause nexus doesn't seem to like if you try to capture something from the game and use that info in the same alias, at least from my experience...