diff --git a/src/diana/sgfParser/node.py b/src/diana/sgfParser/node.py
--- a/src/diana/sgfParser/node.py
+++ b/src/diana/sgfParser/node.py
@@ -1,4 +1,5 @@
 from collections import deque
+import logging as log
 
 from . import skipWhitespace, ParserWarning
 from .property import Property, GAME_INFO
@@ -23,8 +24,7 @@ class Node:
 		while Property.fits(s,i):
 			i,x=Property.create(s,i)
 			if x.name in res.properties:
-				# !! raise or log or ignore
-				raise ParserWarning('duplicate "{0}" property in a node. second value ignored'.format(x.name),s,i)
+				log.warning(ParserWarning('duplicate "{0}" property in a node. second value ignored'.format(x.name),s,i))
 			else:
 				res.properties[x.name]=x
 			i=skipWhitespace(s,i)