If you are sure you gave the file to your client, tell him to double click the file in the Project window, it will open up the dialogue box so and from there he can navigate and reload the file. I’m guessing that AE is looking for the file from a path structure on your network/system that isn’t on his. Not that I would ever give a client my project(Never) or source files(very rarely), but the best way to do this is to use the File > Collect Files command. This will create a project folder, a new project file & copy every asset of your project to that folder and then relink them to the new project. Very helpful when you have files from an entire network in one project.
Before you collect files you might want to do some project housekeeping & organization. You can consolidate the project which if you happen to have the same file twice will remove duplicates. Another thing is to reduce it the project. Select all your final comps, then hit the File > Reduce Project command—this will remove anything you didn’t use or is associated with your final comps.
Johnny Cuevas, Editor
Thinkck.com
“I have not failed 700 times. I have succeeded in proving that those 700 ways will not work. When I have eliminated the ways that will not work, I will find the way that will work.”
—THOMAS EDISON on inventing the light bulb.