diff -r 68b921ce1944 -r 4ab8c027df23 libraries/iosrv/server/readwrite.cpp
--- a/libraries/iosrv/server/readwrite.cpp	Fri Jun 25 13:06:42 2010 +0100
+++ b/libraries/iosrv/server/readwrite.cpp	Thu Jul 29 12:02:58 2010 +1000
@@ -362,8 +362,13 @@
 		ReadEndPoint()->IorepDetach(*this);
 		}
 
-	aEndPoint.IorepAttachL(*this, aMode);
 	iEndPoint = &aEndPoint;
+	TRAPD(err, aEndPoint.IorepAttachL(*this, aMode));
+	if (err)
+		{
+		iEndPoint = NULL;
+		User::Leave(err);
+		}
 	}
 
 void CIoReadObject::SetReadMode(RIoReadHandle::TReadMode aMode)
@@ -954,8 +959,13 @@
 		WriteEndPoint()->IowepDetach(*this);
 		}
 
-	aEndPoint.IowepAttachL(*this);
 	iEndPoint = &aEndPoint;
+	TRAPD(err, aEndPoint.IowepAttachL(*this));
+	if (err)
+		{
+		iEndPoint = NULL;
+		User::Leave(err);
+		}
 	}
 
 void CIoWriteObject::WriteL(const RMsg& aMessage)