From ee4f05411d2c3046e3a6fcc557674bc657183785 Mon Sep 17 00:00:00 2001
From: Henry Weller <http://cfd.direct>
Date: Thu, 3 Nov 2022 15:54:50 +0000
Subject: [PATCH] functionObjects::fieldAverage: Print warning if used with
 foamPostProcess

Field averaging can only be performed during the run as the averaging is
performed every time-step.

Resolves bug-report https://bugs.openfoam.org/view.php?id=3922
---
 .../field/fieldAverage/fieldAverage.C             | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/src/functionObjects/field/fieldAverage/fieldAverage.C b/src/functionObjects/field/fieldAverage/fieldAverage.C
index c72070bd8c..a758984b6b 100644
--- a/src/functionObjects/field/fieldAverage/fieldAverage.C
+++ b/src/functionObjects/field/fieldAverage/fieldAverage.C
@@ -375,9 +375,20 @@ Foam::wordList Foam::functionObjects::fieldAverage::fields() const
 
 bool Foam::functionObjects::fieldAverage::execute()
 {
-    calcAverages();
+    if (functionObject::postProcess)
+    {
+        WarningInFunction
+            << "fieldAverage is not supported with the foamPostProcess utility"
+            << endl;
 
-    return true;
+        return false;
+    }
+    else
+    {
+        calcAverages();
+
+        return true;
+    }
 }