unable to build project output group in Build??

[Netnoobie]

Im getting this error in my project build:
unable to build project output group Content Files from Project1 (Active)

This jsut started coming up. In the past I was able to build everything fine, but now I see that error. Can someone tell me whats going on?

Many thanks!
Bryan

 

[Rac]

I think that This problem occurs when there are images in your project that dont exist in the physical images folder.

Disconnect from your project, all images that arent physically present in images folder of your hard disk.

regards