From ae3bd9063032a5d377e3882d47109bbf222da447 Mon Sep 17 00:00:00 2001
From: Henry Weller <http://cfd.direct>
Date: Sun, 2 Jul 2023 20:20:48 +0100
Subject: [PATCH] fvMeshTopoChangersMeshToMesh: Reinstated call to
 deltaCoeffs()

to ensure the deltaCoeffs are available for constraint BC evaluation.
---
 .../meshToMesh/fvMeshTopoChangersMeshToMesh.C                  | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/fvMeshTopoChangers/meshToMesh/fvMeshTopoChangersMeshToMesh.C b/src/fvMeshTopoChangers/meshToMesh/fvMeshTopoChangersMeshToMesh.C
index 54f7669fb5..6a916d4699 100644
--- a/src/fvMeshTopoChangers/meshToMesh/fvMeshTopoChangersMeshToMesh.C
+++ b/src/fvMeshTopoChangers/meshToMesh/fvMeshTopoChangersMeshToMesh.C
@@ -255,6 +255,9 @@ bool Foam::fvMeshTopoChangers::meshToMesh::update()
             cellsToCellss::intersection::typeName
         );
 
+        // Ensure the deltaCoeffs are available for constraint patch evaluation
+        mesh().deltaCoeffs();
+
         // Map all the volFields in the objectRegistry
         #define mapVolFieldType(Type, nullArg)                                 \
             MeshToMeshMapVolFields<Type>(mesh(), mapper);