Using MEP pro 2013 Plus, I have a big project with footage from various HD cameras on lots of tracks most of which are Muted. I also export to mpeg2 files and reimport. Some of the cklips are small parts of big files (4GB). Save produces the message "Building frame-table for quick MPEG access…" repeatedly, as does close after a save. Moving the timeline cursor also often invokes similar messages. It would be helpful if I knew what file it was working on, and why does it need to create these files when closing? For a program which purports to be very fast, waiting ages for these messages to finish does not make for rapid edits. Playing off the timeline can also be suspended while it creates these files for fast access. It can be very frustrating.