Used "Duplicate Cleaner for iPhoto" now my video files in iPhoto have an error message "A necessary data reference could not be resolved."

As the title states, I used the app "Duplicate Cleaner for iPhoto" to get rid of 6 GB of duplicate pictures. However, now when I go to view a video in iPhoto, I get the error message "A necessary data reference could not be resolved." I am able to view the video clips (with sound, etc.) in Finder. However, I want to know if there is a way to restore them in iPhoto?????
Thanks,
Leslie
I see that the suggested solution is to restore from back-up... is there anyway to do that without bringing in ALL of the duplicate photos I just deleted?

Try going back to QuickTime 7.4, we've seen the same problem occur with the 7.5 update. How did you make the .mov file that plays all of the files? For us, the problem shows up with reference movies (such as that .mov) made on a Mac, but works fine if it is created on Windows.

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Hi, I can no longer access the videos in my iphoto library. It still shows the screenshot and the duration of the video, but when i open, i get the following message ' A necessary data reference could not be resolved'. What can i do ?
Tried also to export, but to no avail.
Thx for suggestions,
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With the amount of information you've provided it's impossible to offer a solution. We can't see your computer so we need to know the details of your problem and setup, i.e.:
what version of iPhoto are you using?
what system version are you running?
Did you apply any updates or upgrades to iPhoto or the system between the time you last were able to view the video files and now?
what fixes have you tried?
where is your library located?
did you apply any updates or upgrades just prior to the problem occurring?
are you running a "managed" or "referenced" library?
what type of Mac?
how much free space on your boot drive?

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OT

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Used "Duplicate Cleaner for iPhoto" now my video files in iPhoto have an error message "A necessary data reference could not be resolved."

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