diff --git a/repository/OpenPonk-Core/OPMementoDirectorySerializer.class.st b/repository/OpenPonk-Core/OPMementoDirectorySerializer.class.st
index ba11bb66..3a171322 100644
--- a/repository/OpenPonk-Core/OPMementoDirectorySerializer.class.st
+++ b/repository/OpenPonk-Core/OPMementoDirectorySerializer.class.st
@@ -59,8 +59,12 @@ OPMementoDirectorySerializer >> loadMementoFrom: aFolder [
 		modelDir := aFolder ].
 	model := self loadModelFrom: modelDir.
 	(OPNavigatorAdapters new allChildrenFor: model) do: [ :each |
+		SystemNotification signal: 'Loaded UUID from slot: ' , (each class
+				 slotNamed: 'uuid'
+				 ifFound: [ :slot | slot read: each ]
+				 ifNone: [ 'No such slot' ]) asString.
 		SystemNotification signal:
-			'Loaded UUID: ' , (each instVarNamed: 'uuid') asString ].
+			'Loaded UUID from method: ' , each uuid asString ].
 	^ OPMemento
 		  model: model
 		  diagrams: (self loadDiagramsOf: model from: aFolder / 'diagrams')
@@ -121,12 +125,16 @@ OPMementoDirectorySerializer >> saveModelOf: aMemento to: aFolder [
 
 	| modelSerializer |
 	(OPNavigatorAdapters new allChildrenFor: aMemento model) do: [ :each |
+		SystemNotification signal: 'Saving UUID from slot: ' , (each class
+				 slotNamed: 'uuid'
+				 ifFound: [ :slot | slot read: each ]
+				 ifNone: [ 'No such slot' ]) asString.
 		SystemNotification signal:
-			'Saving UUID: ' , (each instVarNamed: 'uuid') asString ].
+			'Saving UUID from method: ' , each uuid asString ].
 	modelSerializer := plugin modelSerializerClass new.
 	modelSerializer class saveExportInfoTo: aFolder.
 	(aFolder / 'model' , modelSerializer formatName)
 		ensureDelete;
-		writeStreamDo: [ :stream | 
+		writeStreamDo: [ :stream |
 			stream nextPutAll: (modelSerializer serializeModel: aMemento model) ]
 ]