Actually, I've encountered the same kind of behavior in Final Cut Pro, and AE isn't even running. So I don't think the condition is limited solely to Adobe applications.
I Haven't seen that with FCP. If the file is open... FCP won't overwrite it, But if it selected in the OS I have seen it render over it.
Same problem... 2 years later. What gives adobe? This is a bug.
I hate to say this to a venerable AE user, but I think it's driver error.
I've switched platforms and operating systems. I see the same behavior in Avid & Quicktime on a Windows machine. If a file's somehow in use, either the OS or the application -- I think it's irrelevant which one it is -- won't allow the file to be overwritten. Plain 'n simple. The solution is simple: exit out of the application that's using the file. The issue goes away.
Considering that it hasn't been a big problem for AE users for two years, you might want to reconsider your position on this.
so you're suggesting that I quit out of the OS?
just let that sink in.
if I quit the OS, then the problem will go away.
No application has this file open. it's selected, or just visible in the finder.
No other app at my disposal has this problem. Not even Photoshop, or premiere. After effects is doing something non-standard when rendering to a file, and it's ancient. Been around since the conversion to Carbon.
I think my position is pretty sturdy here, this behavior, especially in light of AE asking if it is infact Ok to overwrite the file, for each and every file, should not be happening. Failure to render because the file cannot be deleted when it is open in another app makes sense, but when it isn't open at all? no sir. That's a bug.
And frankly, just because it isn't talked about in this forum, does not mean it isn't a big problem.
yeah... did that earlier today... and sometime in 2012.