Based on your posted graphic, the files with no previews where saved with no
previews to see. If you look at the second image in the list, it has a
preview saved and you can see it.
A preview is a raster image imbedded in the dwg file: no feature in AutoCAD
let's you see actual content.
but they also don't even have the preview window open in Design Center, see
your own graphic reposted here.
Explore BLOCKICON command, think it was in Lt2005 too.
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Dean Saadallah
Add-on products for LT
http://www.pendean.com/lt
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