Matt, Background on the issue. I had manually in the SE sequenced all but my 16 x 50 DMX megatree. I opened up the preview and removed all the props except the megatree. I then changed the name of the preview and saved it. Rather than create a new preview with a new name, it just renamed the existing preview. I guess I made the wrong assumption that it would save as a new preview. I think it should as that is how the MS styleguide states a file save should work. I realize a preview isn't a file but it has a lot of the same attributes of one. On the second part of your comment, when I open up a sequence that used the preview that is no longer there (at least as originally named), it doesn't give you an importing dialogue box. Since it was just renamed I guess its still technically there and somehow the sequence recognizes it. The problem is that if you've removed props from that renamed preview that are needed by the sequence you are opening, it tells you that it will delete out those parts of the sequence the next time you save the sequence. I ended up spending 4 hours rebuilding my preview last night so that it matched my sequences for this year (I hope). Mike A.