diff --git a/ponsim/realio.py b/ponsim/realio.py
index 77fa770..4691d9c 100644
--- a/ponsim/realio.py
+++ b/ponsim/realio.py
@@ -51,7 +51,7 @@
             yield self.frame_io.stop()
             log.info('stopped')
         except Exception, e:
-            pass
+            log.exception('exception', e=e)
 
     def register_ponsim(self, ponsim):
         self.ponsim = ponsim