Ok, i will try.

For information, I found a workaround :

This two rules work :

rule "3 Rule"
when
(or
  (and v:Venue()
        l:ListeSousVenue()
        p:Param())
  not Venue()
)
then
  System.out.println("OK - 3");
end

rule "4 Rule"
when
(or
(and p:Param()
        l:ListeSousVenue()
        v:Venue())
  not Venue()
)
then
  System.out.println("OK - 4");
end
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