Locate referenced file

To save space, I relocated a few projects to my network drive, using the file-->relocate original.

Now, I can't find a way to indicate in aperture where the original photo or project is located. I want to know if a given photo is located in the main mac hard drive, or if it is one of the photos I have relocated,

If I highlight a photo and select "locate referenced file" it says "The selection doesn’t have any referenced files.".

If I go under info for the phot and select file info, it just gives me the name of the file but not where it's located.

Where in aperture can I find where the orifinal file is stored?

Thanks.