The missing titles and effects, generators warning problem in FCPX.

Thankyou Tom Wolsky for the correction direction. I had a similar warning come up when exporting a file. I hit Shift - Command - 2 and the edit appeared on the left side of my screen. Scrolling through each edit, I noticed 1 screen grab still shot had the yellow triangle attached. The file had disconnected itself from FCP. I re-linked the file, then re-exported my program without any further problems. Thanks all for your input. Cheers, Ross