diff --git a/src/sparqlunicorn_ontdoc/docgeneration.py b/src/sparqlunicorn_ontdoc/docgeneration.py
index 17d20742..3f2b33af 100644
--- a/src/sparqlunicorn_ontdoc/docgeneration.py
+++ b/src/sparqlunicorn_ontdoc/docgeneration.py
@@ -1405,6 +1405,7 @@ def processCollectionPages(self,pagesmap,graph,subject,f):
 
 def main():          
     prefixes={"reversed":{}}
+    print("PREFIX EXISTS? "+resourcepath+'prefixes.json '+str(os.path.exists(resourcepath+'prefixes.json')))
     if os.path.exists(resourcepath+'prefixes.json'):
         with open(resourcepath+'prefixes.json', encoding="utf-8") as f:
             prefixes = json.load(f)