I have a score with Double Basses Divided into
2 Orchestral Players (bar 5 until the end - bar 18)
of which one plays a Solo (bar 11-14)
In the Main Score the Solo Double bass occupies the top line and the orchestra players the two staves below.
I don’t want the Solo Player to be visible before bar 8. I somehow struggle to get this result, it seems if I change the Divisi at bar 5, staves disappear…
So I started from scratch again:
Bar 1 Divisi: Orchestra Player 1 and Orchestra Player 2
Bar 11 Divisi change (add a Solo Player), ok, the staff is now added above.
Bar 15 Divisi change (Only 2 Orchestra Players left).
Again this does not work: the Solo Double Bass Player ends up as a Divisi in the Cellos above…
My guess is, the tied notes into bar 11 generate a problem with Divisi change.
If one deletes the Divisi Flags, music does disappear…
I appreciate help
 I have put the Divisi at the beginning of the tied notes.
So far ok, but the Solo Player does appear below.
Is there a way to get the Solo line above the orchestra players?
This is the Divisi order at bar 9: