diff -r fe67489523b5 -r 6e838748867b src/documentmanager.cpp
--- a/src/documentmanager.cpp	Sun Nov 03 17:57:21 2019 +0200
+++ b/src/documentmanager.cpp	Sun Nov 03 18:09:47 2019 +0200
@@ -127,7 +127,7 @@
 	Model* model = this->findModelByName(modelName);
 	for (int i = 0; i < model->size(); i += 1)
 	{
-		const QString referenceName = model->getObjectProperty(i, modelobjects::Property::ReferenceName).toString();
+		const QString referenceName = model->getObjectProperty(i, linetypes::Property::ReferenceName).toString();
 		if (not referenceName.isEmpty()
 			and openModels.find(referenceName) == std::end(openModels)
 			and not missing.contains(referenceName))