OBIEE 11g Log File Locations

The Table Below shows the log files for the Oracle BI EE system components. .You can access all of these log files from the Enterprise Manager Fusion Middleware Control.

BI Component	Log File	Log File Directory
OPMN	debug.log	ORACLE_INSTANCE/diagnostics/logs/OPMN/opmn
OPMN	opmn.log	ORACLE_INSTANCE/diagnostics/logs/OPMN/opmn
BI Server	nqserver.log	ORACLE_INSTANCE/diagnostics/logs/ OracleBIServerComponent/coreapplication_obis1
BI Cluster Controller	nqcluster.log	ORACLE_INSTANCE/diagnostics/logs/ OracleBIClusterControllerComponent/coreapplication_obiccs1
Oracle BI Scheduler	nqscheduler.log	ORACLE_INSTANCE/diagnostics/logs/ OracleBISchedulerComponent/coreapplication_obisch1
Presentation Services	sawlog*.log (for example, sawlog0.log)	ORACLE_INSTANCE/diagnostics/logs/ OracleBIPresentationServicesComponent/ coreapplication_obips1
BI JavaHost	jh.log	ORACLE_INSTANCE/diagnostics/logs/ OracleBIJavaHostComponent/coreapplication_objh1

Note: In my case the directory is at C:\OBIEE11g_11_1_1_7\instances\instance1
           C:\OBIEE11g_11_1_1_7\instances\instance1 is ORACLE_INSTANCE.

You can also view or search the log files in the Enterprise Manager(Fusion Middleware Control).