I've been experimenting a lot with MPL files in the last few days (mainly as a means of importing data as described in this thread:
http://yabb.jriver.com/interact/index.php?topic=47538.0)
Basically, I've got an MPL file containing values for various fields, with the filepaths/names matching those in MC (ie files are already in the MC database).
To import the data, I open MC and go to File > Import Playlist > Navigate to the MPL file.
This works fine... the data is imported perfectly. The problem occurs when you wish to import another MPL file containing data for the same files.
When I try to import a second MPL (ie with updated field information or with new fields), MC ignores the changes completely. I can understand it might be design to not overwrite existing values, but it's not even adding values for empty fields, or populating values for new fields...
This is really problematic!! To the MPL users... am I doing something wrong here?
How can I get MC to *forget* it's imported data previously and just go with the new data.
Note also that I'm dealing with video files, so there's no physical tag which might confuse the issue.