Error when importing playlists

[sergedt]

Good morning,
I have home MusicBee working nicely.
I want to use MusicBee on my vacation's house and use the playlists I created home.

Home installation:
2 PC's with MusicBee on a network, all the music is located on a NAS disk on the network.

Vacation home:
1 standalone PC with MusicBee

What I did:
- On my home installation, I copied all the music files from the NAS disk and exported the playlists
- On the vacation installation, I copied all the music files on the PC itself.
- I asked to import the playlists.
- As the location of the playlists is totally different (not on a NAS), but locally on the PC, I tried to change the location with the option:
File; Library; "Relink Music File Paths"

The result is a little bit strange:
In the Inbox, all the files have the right "artist", "title", "genre", aso...
When i open the imported playlist, SOME files have the right information (artist, title, ...),but many files have no artist name.
In that case, in the "title", I have "artist name - Title", no genre aso ...
- In the Inbox, I can edit the file, it's correct
- In the playlist, it says "file not found".

Any idea, suggestion?
I can send print screen if it helps.
Thank you already

Serge