From 039d5c0b63f0be83050b39bd5c4abd90acac1a07 Mon Sep 17 00:00:00 2001
From: Patrick Shriwise <pshriwise@gmail.com>
Date: Tue, 2 Apr 2019 15:09:10 -0500
Subject: [PATCH] Adding check for a valid delayed group filter when scoring.

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

diff --git a/src/tallies/tally_scoring.cpp b/src/tallies/tally_scoring.cpp
index 7e235fa458..c2e5fb2080 100644
--- a/src/tallies/tally_scoring.cpp
+++ b/src/tallies/tally_scoring.cpp
@@ -257,7 +257,9 @@ score_fission_eout(const Particle* p, int i_tally, int i_score, int score_bin)
       #pragma omp atomic
       tally.results_(filter_index, i_score, RESULT_VALUE) += score;
 
-    } else if (score_bin == SCORE_DELAYED_NU_FISSION && g != 0) {
+    } else if (score_bin == SCORE_DELAYED_NU_FISSION &&
+               g != 0 &&
+               tally.delayedgroup_filter_ > 0) {
 
       // Get the index of the delayed group filter
       auto i_dg_filt = tally.filters()[tally.delayedgroup_filter_];