I created another view (vuall) that is composed of some of the fields from all three previous views.

composed ? In which way?

If vuall is local, then for REQUERY("vuall")

REQUERY("vu1")
REQUERY("vu2")
REQUERY("vu3")
REQUERY("vuall")

se vuall is remote union rewrite with the UNION,

...
UNION ALL
...
UNION ALL