From dd89d21951d210c4a6a4ff651e93280563922892 Mon Sep 17 00:00:00 2001
From: Matthieu Dorier <mdorier@anl.gov>
Date: Thu, 26 Sep 2019 16:41:30 +0100
Subject: [PATCH] corrected dataset::begin

---
 src/DataSet.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/DataSet.cpp b/src/DataSet.cpp
index 0c7a46c..315024b 100644
--- a/src/DataSet.cpp
+++ b/src/DataSet.cpp
@@ -253,7 +253,9 @@ DataSet::iterator DataSet::begin() {
     if(!valid()) {
         throw Exception("Calling DataSet member function on an invalid DataSet");
     }
-    DataSet ds(m_impl->m_datastore, m_impl->m_level+1, fullname(),"");
+    // we use the prefix "&" because we need something that comes after "%"
+    // (which represents runs) and is not going to be in a dataset name
+    DataSet ds(m_impl->m_datastore, m_impl->m_level+1, fullname(),"&");
     ds = ds.next();
     if(ds.valid()) return iterator(ds);
     else return end();
-- 
2.26.2