Every record of an album carries all the composers of all songs.
How can I transfer the embedded CUE_TRACK_COMPOSER to the corresponding COMPOSER field?
I have a few albums with this issue.
At the moment I only see the not so comfortable solution to create an action group with actions for every possible tracknumber.
Action Type: Format Value
Field: COMPOSER
Format String: $if($eql(%track%,01),%cue_track01_composer%,)
Format String: $if($eql(%track%,02),%cue_track02_composer%,)
and so on.
Thank you for your idea. 
It would surely help.
I will still try to find a better solution. 