From 138e6d3dfe75a0bea2e7f573c95803ff21a36090 Mon Sep 17 00:00:00 2001
From: andy <andy>
Date: Mon, 17 Feb 2014 16:44:14 +0000
Subject: [PATCH] ENH: forces - issue a warning if porosity effects requested
 but no models found

---
 src/postProcessing/functionObjects/forces/forces/forces.C | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/postProcessing/functionObjects/forces/forces/forces.C b/src/postProcessing/functionObjects/forces/forces/forces.C
index 84863f7f..488a71a8 100644
--- a/src/postProcessing/functionObjects/forces/forces/forces.C
+++ b/src/postProcessing/functionObjects/forces/forces/forces.C
@@ -912,6 +912,14 @@ void Foam::forces::calcForcesMoment()
         const HashTable<const porosityModel*> models =
             obr_.lookupClass<porosityModel>();
 
+        if (models.empty())
+        {
+            WarningIn("void Foam::forces::calcForcesMoment()")
+                << "Porosity effects requested, but no porosity models found "
+                << "in the database"
+                << endl;
+        }
+
         forAllConstIter(HashTable<const porosityModel*>, models, iter)
         {
             const porosityModel& pm = *iter();