Enable the tracing option in Replication Server to gather connector-level and connection-level diagnostic information.
Diagnostic information related to ExpressConnect for HANA DB execution is available for operations at both the connector level and the connection level, and for various diagnostic conditions. Not all conditions are available for both connector-level and connection-level tracing. Some also require the use of the diagnostic version of the ExpressConnect for HANA DB executable.
To enable tracing for ExpressConnect for HANA DB, see ExpressConnect for Oracle Configuration Guide > Configuring ExpressConnect for Oracle > Trace and Debug.