From 2e1c15056c523cc338b781b1ef165b00b553ebf9 Mon Sep 17 00:00:00 2001
From: Tamas Gal <tgal@km3net.de>
Date: Fri, 25 Jan 2019 19:21:58 +0100
Subject: [PATCH] Fix file opening

---
 scripts/msg_dumper.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/msg_dumper.py b/scripts/msg_dumper.py
index b77fd93..722146e 100755
--- a/scripts/msg_dumper.py
+++ b/scripts/msg_dumper.py
@@ -27,7 +27,7 @@ from km3pipe.io import CHPump
 class MSGDumper(Module):
     def configure(self):
         self.filename = self.get('filename', default='MSG.log')
-        self.fobj = open(os.path.abspath(self.filename))
+        self.fobj = open(os.path.abspath(self.filename), 'a')
 
     def process(self, blob):
         data = blob['CHData']
-- 
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