diff --git a/macros/CCEScan/batch/hadd.py b/macros/CCEScan/batch/hadd.py
index 0b6047a..b4c7607 100644
--- a/macros/CCEScan/batch/hadd.py
+++ b/macros/CCEScan/batch/hadd.py
@@ -4,6 +4,10 @@
 
 fills = sys.argv[1:]
 
+if len(fills) < 1:
+    print 'give me the fill numbers as input!'
+    sys.exit(-1)
+
 disk = os.path.expandvars('$DISK') + '/data/ST/Aging'
 
 ll = {}
@@ -12,6 +16,11 @@
 targets = []
 for fill in fills:
     targets += ll[fill]
+
+os.system('rm haddfile.sh')
+
 with open('haddfile.sh', 'wb') as f:
     f.write('hadd -f %s/CCEScan_temp.root %s\n' % (disk, ' '.join(targets)))
-    f.write('hadd -f %s/CCEScan.root %s/CCEScan.root /disk/data1/hep/elena/data/ST/Aging/CCEScan_temp.root\n' % (disk, disk))
+    f.write('hadd -f %s/CCEScan_all.root %s/CCEScan.root /disk/data1/hep/elena/data/ST/Aging/CCEScan_temp.root\n' % (disk, disk))
+    f.write('mv %s/CCEScan.root %s/CCEScan_lastbk.root\n' % (disk, disk))
+    f.write('mv %s CCEScan_all.root %s/CCEScan.root\n' % (disk, disk))