--- a/src/net/timbusproject/context/converter/OWLExport.java
+++ b/src/net/timbusproject/context/converter/OWLExport.java
@@ -310,6 +310,7 @@
 
         if (ontologyIRI == null || ontologyIRI.trim().length() == 0) {
             ontologyIRI = getDefaultIRI(layoutFile);
+            System.out.println("Ontology IRI not specified, defaulting to " + ontologyIRI + ", computed from file " + layoutFile.getName());
         }
 
         return exportLayout(layoutFile, ontologyIRI, view);