From 299899f4adcac6f012c5494ac801411593d3eb09 Mon Sep 17 00:00:00 2001
From: Jürgen Knödlseder <jurgen.knodlseder@irap.omp.eu>
Date: Fri, 10 Apr 2015 22:19:58 +0200
Subject: [PATCH] Set empty energy boundaries in case that all energies are excluded.

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

diff --git a/src/ctselect/ctselect.cpp b/src/ctselect/ctselect.cpp
index 735195d..d27cdb6 100644
--- a/src/ctselect/ctselect.cpp
+++ b/src/ctselect/ctselect.cpp
@@ -1006,7 +1006,9 @@ GEbounds ctselect::set_ebounds(GCTAObservation* obs, const GEbounds& ebounds) co
 
     // Set selection energy boundaries
     GEbounds result;
-    result.append(GEnergy(emin, "TeV"), GEnergy(emax, "TeV"));
+    if (emax > emin) {
+        result.append(GEnergy(emin, "TeV"), GEnergy(emax, "TeV"));
+    }
 
     // Return result
     return result;
--
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