--- a/tsrc/mceclientstub/src/mcefilesource.cpp	Tue Aug 31 15:12:07 2010 +0300
+++ b/tsrc/mceclientstub/src/mcefilesource.cpp	Wed Sep 01 12:31:01 2010 +0100
@@ -324,6 +324,8 @@
 //
 void CMceFileSource::InitializeL( CMceManager* aManager )
     {
+    __ASSERT_ALWAYS( aManager, User::Leave( KErrArgument ) );
+
     iDuration = TTimeIntervalMicroSeconds( 100000000 );
     
     iAudioElementCount = 1;