--- a/kernel/eka/memmodel/epoc/mmubase/mmubase.cpp	Mon Oct 18 15:31:10 2010 +0100
+++ b/kernel/eka/memmodel/epoc/mmubase/mmubase.cpp	Wed Oct 20 13:58:28 2010 +0100
@@ -4524,7 +4524,7 @@
 		aLock.iLockedStart = aStart;
 		aLock.iLockedPageCount = numPages;
 		aLock.iProcess = process;
-		aLock.iProcess->Open();
+		aLock.iProcess->CheckedOpen();
 		}
 
 	NKern::UnlockSystem();