From 66ddf0a1044b93f87b3035e4a90f8cf6f848c18d Mon Sep 17 00:00:00 2001
From: mattijs <mattijs>
Date: Thu, 7 Jul 2022 14:02:31 +0100
Subject: [PATCH] BUG: multi-world: only switch on warnComm if needed. See
 #2529

---
 src/functionObjects/utilities/syncObjects/syncObjects.C | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/functionObjects/utilities/syncObjects/syncObjects.C b/src/functionObjects/utilities/syncObjects/syncObjects.C
index 3376f5ff6c..88f613da6b 100644
--- a/src/functionObjects/utilities/syncObjects/syncObjects.C
+++ b/src/functionObjects/utilities/syncObjects/syncObjects.C
@@ -75,14 +75,14 @@ void Foam::functionObjects::syncObjects::sync()
             << " root:" << root_ << endl;
     }
 
-    const label oldWarnComm = UPstream::warnComm;
-    UPstream::warnComm = 0;
-
     if (!Pstream::parRun())
     {
         return;
     }
 
+    const label oldWarnComm = UPstream::warnComm;
+    UPstream::warnComm = 0;
+
 
     // Send my data to all other processors
     // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~