[Shyam Mistry] "well i have installed a codecc pack for windows media player and now that error message doesnt pop up"
Installing codec paks is never a good idea for video editing. I assume the problem started before the codec pak was installed.
I would use a tool like MediaInfo or GSpot with the AVI file to see if they think it is truly uncompressed. It would be interesting to see what codec they think the AVI file is using.
~jr
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