Please be more specific. You didn't tell us anything about your actual drive layout and where those files are stored, what operating system etc.. This could be anything from permission issues to some cached files still lingering to Spotlight doing something weird or Quicktime having a hold over certain file type associations. Your mention of Reconnect also confused the hell out of me, as that would refer to Premiere, not AE, so please try to use the correct AE technobabble next time.
You are right, my apologies. It's Replace footage.
My hard drive layout is four 1TB RAID 0 with all of my media stored under folders rather than individual disk drives. I'm running Snow Leopard on a MacPro 1,1.
I think I might have fixed it. Before, when "Replace Footage" was selected, I did a search for my offline media. That's what locked it up. Now, I navigate to the spefic folder and locate the file myself. That worked with no lock up.
Is that a little more clear?
Ah, I see. Yes, of course. It should not lock up, though. Perhaps it was just taking forever to index a few hundred thousand files or so, starting in the wrong place based on the info stored in the project. If manually pointing AE to a folder fixes it, then that probably is good enough a solution for the time being. Let us know when anything else is up.
Yes, if I manually loacate the file, then it WON'T lock up. If I perform a search for that file (in the After Effects Replace Footage window), it DOES. Strange.
In Apple's Final Cut Pro, the Search function for reconnecting media works quite well so I'm certain this is not a MacOS files system issue.
I've had this same thing happen to me in AE. I just figured it was a minor bug, something ugly between the MacOS Spotlight and Adobe? They're not getting along with each other. I gave up trying to figure it out and simply use your same workaround.