Cannot share from timeline because item is "still referencing media on the camera." FCP had no problem sharing these files yesterday.

There's only one reason: the clip's media cannot be located.

You may have failed to completely import the media (and had the camera attached yesterday), your media is on a drive that is longer attached, or you have somehow deleted the media.

Select the clip and then "show in finder'" and tell us what happens.

Create a new library, and import the problematic clips into the new library. Once that's complete, copy the clips from the new library to your original one.

You can't reveal in Finder from the timeline. Only from the browser. Shift-F to get to the browser clip.

James Cude wrote:

Create a new library, and import the problematic clips into the new library. Once that's complete, copy the clips from the new library to your original one.

James, this suggestion assumes the original media, from the camera, can be located and then reimported, does it not? Will not simply hooking the camera back up solve the problems of the missing media that is still being referenced?

OP: Imported media into an event, edited in timeline and shared (to default, master file), without a hitch, yesterday. Today I can't share because item "is still referencing media on camera."

No libraries in the early versions. have you tried File>Import>Reimport from camera? If that doesn't work, with the camera or card connected try sharing. Dont think there's anything else that will work with that version.