1)

By default fix-missing picks up files from the addpaths by checking if the file exists (crc check) in the set stored there. So if pacman/bla.bin is missing it checks addpaths\pacman. It also checks possible parent/clone sets
So if you got the missing file there but stored in a different set, it won't be picked up. There are some other rules but they don't play a role here...There is a scanner advanced fix-missing option to search all sets but this slows down the scan process immensly.

Normally people add missing files with the rebuilder.

Samples don't have checksums listed in the datfile/MAME, so they can't be found or rebuilt.

2) full and not merged options are greyed out since you answered a question with 'NO' during datfile-parsing. There are some sets which can't be fully merged if their parent/clone relationship isn't removed. During parsing you are asked if you want to remove the parent/clone relationship or not. If you answer NO, you are forced to split-merged mode. Use profiler->clear cache and reload the profile if you want to revise your answer.


Roman Scherzer