Another reason to stay away from this incompetant function. I had a timeline that had media clips and AE dynamically linked clips on it. When I (out of necessity) trimmed the project from 56GB to 5GB I learned a horrible thing. When I reopened the project on another system, random media used in the AE dynamica linked clips was missing. Not ALL the media, just arbitrary (or so it seems). Its a shame that such a fine NLE stinks in some ways.