Which error-message does you get?
I have this application that archives data to a different schema on the same instance using database link. This is probably due to the fact that in the Production environment it is archived to a different instance. Two schemas are using database links to connect to themselves. One successfully connects using the same service name to itself but the other does not. I am wondering what the trick the schema has while the other one can't connect.Example: In tnsnames.ora two service names are defined DB1 and DB2 (these are also the SID's)At DB1 instance a public database link is created.CREATE PUBLIC DATABASE LINK arcdb CONNECT TO arc_db IDENTIFIED BY .....USING "DB1"; This works. But in the other instance, CREATE PUBLIC DATABASE LINK arcdb CONNECT TO arc_db IDENTIFIED BY ... USING "DB2"; doesn't work.