Oracle Error ORA-23367: table string is missing the primary key

Oracle Error Message

ORA-23367: table string is missing the primary key

Reason for the Error

Table specified in argument “oname1” or “oname2” in call to “differences()” routine does not contain either a primary key or a virtual primary key (defined through dbms_repcat package under symmetric replication).

Solution

Make sure the tables specified have a primary key defined.