It was some sort of error message, I think. Like the ones you'd see if you fucked up your computer real bad.

[ She says it offhandedly, humming to herself inquisitively and keeping a close eye on her copy, who seems to not say anything, but she isn't crumpling up entirely, either. ]

But yeah, it was near the silver doors. As for how many, I think there were four others, besides her.