can't determine relationship

tblP has a one to many relationship to tblPA - direction single from one to many
tblPA has a many to one relationship to tblO - direction single from one to many
tblO has a one to many relationship to tblOC - direction both

At present, I am populating a table visual with the following fields:
tblO.Name, tblP.Saddress

I am unable to pull a third column. This field is from tblOC.Idata
When I drag the field to table visual, it says can't determine relationships between the fields

In-case it helps:
The following tables have a unique field as follows:
tblPA.PK
tblOC.PK

Any suggestions how I can pull the field "tblOC.Idata" onto the table visual?

Thank you