From 08e7043f8d0cf3bfce5b47d468442079dd17de03 Mon Sep 17 00:00:00 2001
From: Kevin Sawatzky <66632997+nuclearkevin@users.noreply.github.com>
Date: Tue, 18 Mar 2025 16:19:15 -0500
Subject: [PATCH] Throw an error if a spherical harmonics order larger than 10
 is provided. (#3354)

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

diff --git a/src/tallies/filter_sph_harm.cpp b/src/tallies/filter_sph_harm.cpp
index 7441f32fb..1989e6ef1 100644
--- a/src/tallies/filter_sph_harm.cpp
+++ b/src/tallies/filter_sph_harm.cpp
@@ -25,6 +25,9 @@ void SphericalHarmonicsFilter::set_order(int order)
   if (order < 0) {
     throw std::invalid_argument {
       "Spherical harmonics order must be non-negative."};
+  } else if (order > 10) {
+    throw std::invalid_argument {"Spherical harmonics orders greater than 10 "
+                                 "are currently not supported!"};
   }
   order_ = order;
   n_bins_ = (order_ + 1) * (order_ + 1);