diff --git a/applications/utilities/mesh/conversion/ideasUnvToFoam/ideasUnvToFoam.C b/applications/utilities/mesh/conversion/ideasUnvToFoam/ideasUnvToFoam.C
index c1a3512..6f506e8 100644
--- a/applications/utilities/mesh/conversion/ideasUnvToFoam/ideasUnvToFoam.C
+++ b/applications/utilities/mesh/conversion/ideasUnvToFoam/ideasUnvToFoam.C
@@ -478,6 +478,15 @@ void readCells
 
     Info<< "Read " << cellVerts.size() << " cells"
         << " and " << boundaryFaces.size() << " boundary faces." << endl;
+
+    if (!cellVerts.size())
+    {
+        WarningInFunction
+            << "CAUTION: There are no cells in this mesh!"
+            << " Keep in mind that 2D meshes are not supported, these must"
+            << " always be 3D."
+            << endl;
+    }
 }