Does SQL Server Replication work with Oracle 12C?

Hi,

We've been using SQL Replication to pull down Oracle data for years using SQL 2008 R2 Enterprise Edition. Since we upgraded to Oracle 12C we can no longer create an Oracle Publisher on the SQL Server.  Same lack of results with SQL 2014.  However, existing replication subscriptions continue to work. 

The error we receive when creating a new Oracle Publisher is 21613.  'Constraint column 'PRIKEY' not found in table 'xxx'.  Changed database context to 'distribution'.

Any helpful advice?

Thanks.