Roman, thank you for the tips in email! I decided to take my latest problem to the forum so I'm not burdening you as directly. :-)

My MAME rom collection consists of 668 zipfiles. Almost all of these are 'not merged' roms -- each file contains the complete set of roms for a game, without depending on parent romsets. I've deleted lots of clones. I want to make sure I've got rid of all the clone roms I don't need, so I'm using the Rebuilder on my collection with 'No Merging' selected.

I'm having two problems with the Rebuilder. One is that it's creating incomplete clone zipfiles when it shouldn't be creating clones at all, because I don't have the clone roms for a set. For example: I start with '19xx.zip' which contains 20 romfiles (all the roms needed for the game, none of the clone roms). I run it through the Rebuilder with 'No Merging' turned on, and then my destination folder contains '19xx.zip' with 20 romfiles in it, and '19xxh.zip' '19xxj.zip' '19xxjr1.zip' with only 12 roms in each -- the twelve which are common to the parent. Of course, these clone zipfiles aren't playable, since they're missing the clone roms. (Roman, this is the same problem I was having with the Merger, but it's still happening now that I'm using the Rebuilder!)

The other problem I'm having with the Rebuilder is that it runs for just a minute or two, processing a couple of zipfiles and getting to maybe 1% or 2% in its progress bar, then it gives me the dialog telling me that it's finished and showing me the statistics. If I dismiss that dialog then click 'Rebuild' again then it processes a few more zipfiles then again says it's done. I have to keep restarting it.

Am I doing something wrong? Thanks for any tips!