Where's that coming from? It's an invalid character for file and folder names. Macs may be able to deal with it locally, but it's absolutely not allowed for networks or Windows machines.
To be even more explicit about what Mylenium said:
You can't use a colon (:) in a file name. That symbol represents a break in the path for the file system.
That's the weird thing. I selected all of my comps. Then I reduced the project. I noticed that in the warning message there was a colon. I viewed all files associated with the project, and there are no files with a colon in the name. I even used the search bar in the project window to try to isolate any files with a colon in the name, and nothing showed up in my search. Any ideas?
Maybe you can narrow the scope of the problem:
Try doing it with just one comp selected.
If it doesn't work, try a different comp.
If it does work, add more comps until the issue occurs.
I tried just selecting one comp, and the same thing keeps happening. I tried it on various random comps, and I cannot figure it out. I've been using after effects for many years now, and this is a first for me.
Don't worry, it's an easy fix! You just have to change a folder name. Find the location where the original asset is linked, and check the parent directory structure for any rogue glyphs, like a backslash (when AE is collecting files, this will turn into a colon). Relink to the same asset, and you are good!
Thanks man! Found the suspect folder.
From: npetteys <email@example.com>
Date: Thu, 20 Oct 2011 15:33:38 -0600
To: Eric Roth <firstname.lastname@example.org>
Re: After Effects warning: Error with Directory
created by npetteys <http://forums.adobe.com/people/npetteys> in After
Effects - View the full discussion
Don't worry, it's an easy fix! You just have to change a folder name. Find
the location where the original asset is linked, and check the parent
directory structure for any rogue glyphs, like a backslash (when AE is
collecting files, this will turn into a colon). Relink to the same asset,
and you are good!
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