diff --git a/app/models.py b/app/models.py
index da5275d9..962aee73 100644
--- a/app/models.py
+++ b/app/models.py
@@ -412,6 +412,7 @@ class CorpusFile(db.Model):
 
     def delete(self):
         logger = logging.getLogger(__name__)
+        logger.warning('Called CorpusFile.delete')
         path = os.path.join(current_app.config['OPAQUE_STORAGE_DIRECTORY'],
                             self.dir,
                             self.filename)
@@ -459,13 +460,20 @@ class Corpus(db.Model):
 
     def delete(self):
         logger = logging.getLogger(__name__)
+        logger.warning('Called Corpus.delete')
         for corpus_file in self.files:
             corpus_file.delete()
+        logger.warning('bis hierhin und nicht weiter')
+        logger.warning('base_dir: {}'.format(current_app.config['OPAQUE_STORAGE_DIRECTORY']))
+        logger.warning('user_id: {}'.format(self.user_id))
+        logger.warning('id: {}'.format(self.id))
         path = os.path.join(current_app.config['OPAQUE_STORAGE_DIRECTORY'],
                             self.user_id,
                             'corpora',
                             self.id)
+        logger.warning(path)
         try:
+            logger.warning('Try to remove {}'.format(path))
             shutil.rmtree(path)
         except:
             logger.warning('[ERROR] Corpus.delete')