[villager]

Good day, everybody.
I had build the model in Gambit, that consists of 12 spheres.
These spheres intersect with each other (figure 1 doesn't demonstrate intersections, it shows a critical case when spheres only touch each other).
Since intersections of spheres are circles, there are circle apertures beetween spheres.
I had build central sphere with 12 apertures, then, i've needed to copy this elementary cell in twelve direction (volume->copy). When I copy this object, some apertures have to match, forming only one face instead two aperture faces. They do match in Gambit, but I have to connect them (Face->connect). When trying to connect some of this faces, I have warn message: "The call to connect on list of faces resulted in no actual operation" and no change takes place. It appears because of edges of apertures (they have the same coordinates) have different basic vertices (that marked green by default - I use Gambit 2.3.16).
How can I connect faces (I must have only one aperture face on each intersection to let fluid flow between spheres.
I'm just a beginner in CFD , I've spent a lot of time trying to solve the shown problem, and would be glad for any advice.
John.