From a7a868b6668569678ed02e55def13fc185537173 Mon Sep 17 00:00:00 2001
From: John Stilley <1831479+john-science@users.noreply.github.com>
Date: Fri, 14 Jun 2024 15:23:01 -0700
Subject: [PATCH] Fixing issue with _finalizeInteract in serial jobs (#1730)

---
 armi/operators/operatorMPI.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/armi/operators/operatorMPI.py b/armi/operators/operatorMPI.py
index b00404a54..2f54c75e7 100644
--- a/armi/operators/operatorMPI.py
+++ b/armi/operators/operatorMPI.py
@@ -214,8 +214,9 @@ def _finalizeInteract(self):
         This is only called on the root processor. Worker processors will know
         what to do with the "reset" broadcast.
         """
-        context.MPI_COMM.bcast("reset", root=0)
-        runLog.extra("Workers have been reset.")
+        if context.MPI_SIZE > 1:
+            context.MPI_COMM.bcast("reset", root=0)
+            runLog.extra("Workers have been reset.")
 
     def _resetWorker(self):
         """