You can use Oracle Enterprise Manager to change the logging levels for EPM System managed servers.
To increase the logging level for a product:
In Enterprise Manager, right-click the managed server name, select Logs, and then select Log Configuration.
Expand Root Logger, then oracle, then oracle.apps, and then oracle.apps.epm.fcc.
Set the Oracle Diagnostic level to Trace:32 (Finest) for both oracle.apps.epm.fcc.model and oracle.apps.epm.fcc.ui.
Optional: To keep the change in effect after the current session, select Persist log level state across component restarts.