Media clips "Missing" after upgrade to iMovie 10.0.1
I upgraded from iMovie 9 to 10.0.1 yesterday. After the upgrade, I got a message saying "Some of your projects refer to media that is not available." Those projects with missing media show "ghost clips" on the timeline with transitions, titles, etc., but no actual video. Only about 10% of all my projects have this problem. The video clips exist in the iMovie 9 library and still works fine when launched in iMovie 9. Oddly, the clips also exist in the upgraded iMovie 10 library and are stored in the correct project folder within the "Original Media" folder.
When I click on the "Ghost Clip" in the timeline, there is a message in the viewer that says "Missing File.... FILENAME is missing. Try Reimporting the original source media." I tried to re-import the clips, but it apparently did nothing. I deleted the new iMovie 10 library, then upgraded to iMovie 10 a second time, but the same projects still had the problem. Another person in the forum had a similar problem but found that his "missing" media did not have a valid file extension. He corrected his problem by adding the extension (my extensions are OK). Others had a similar issue because their media was stored in iPhoto (mine isn't).
My current "solution" is to keep iMovie 9 running and have dual libraries, but I fear the day when iMovie 9 no longer functions with a new Mac OS update. Does anyone have suggestions how to "reconnect" my media to the projects?
Thanks,
Dave