diff -r 866b4af7ffbe -r 841f70763fbe mtpdataproviders/mtpplaybackcontroldp/src/cmtpplaybackcontroldp.cpp
--- a/mtpdataproviders/mtpplaybackcontroldp/src/cmtpplaybackcontroldp.cpp	Tue Sep 28 20:14:08 2010 +0800
+++ b/mtpdataproviders/mtpplaybackcontroldp/src/cmtpplaybackcontroldp.cpp	Thu Nov 04 15:31:42 2010 +0800
@@ -282,7 +282,11 @@
 Prepares for a newly-opened session.
 @param aSession notification parameter block
 */
+#ifdef OST_TRACE_COMPILER_IN_USE
 void CMTPPlaybackControlDataProvider::SessionOpenedL(const TMTPNotificationParamsSessionChange& aSession)
+#else
+void CMTPPlaybackControlDataProvider::SessionOpenedL(const TMTPNotificationParamsSessionChange& /*aSession*/)
+#endif
     {
     OstTraceFunctionEntry0( DUP1_CMTPPLAYBACKCONTROLDATAPROVIDER_SESSIONOPENEDL_ENTRY );
     OstTrace1( TRACE_NORMAL, CMTPPLAYBACKCONTROLDATAPROVIDER_SESSIONOPENEDL, "SessionID = %d", aSession.iMTPId );