Error while creating relationship between multiple table

[Guptas]

Hi,

I have 4 tables 2a,3a,3b and 2f as below:

Now i want that i can see the ID's from 3b and ID's from 2f together but it gives me error. I cannot remove the relationship between 2f and 2a as it is crucial for other measures and visuals.
can anybody assit me with this.

Thank you in advance 

[lbendlin]

Combine tables 2a and 3a.

Treat the combined table as a dimension and 2f and 3b as facts.

The ids from 2f and 3f should all be covered by the combined dimension table.