ORA-28543: Error initializing apply connection

admin

ORA-28543: Error initializing apply connection to non-Oracle system
Cause: Attempt to initializeconnection to non-Oracle for heterogeneous
replication failed.
Action: Check if the listenerused to connect to the gateway is up and is correctly
configured. Make sure that the database link used has been configured correctly
and, if a tnsnames alias has been used in the database link definition, makesure
that the configuration of the entry in tnsnames.ora has been done correctly.