From c0909d69c2bb7241d7dbaa915f96cfa065f17e78 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Joachim=20Sch=C3=B6berl?= <joachim.schoeberl@tuwien.ac.at>
Date: Sun, 2 Aug 2020 11:33:11 +0200
Subject: [PATCH] no valid MPI-comm in sequential mode

---
 libsrc/core/mpi_wrapper.hpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libsrc/core/mpi_wrapper.hpp b/libsrc/core/mpi_wrapper.hpp
index c66b2822..9ebe2e69 100644
--- a/libsrc/core/mpi_wrapper.hpp
+++ b/libsrc/core/mpi_wrapper.hpp
@@ -289,6 +289,7 @@ namespace ngcore
 
     size_t Rank() const { return 0; }
     size_t Size() const { return 1; }
+    bool ValidCommunicator() const { return false; }
     void Barrier() const { ; } 
     operator MPI_Comm() const { return MPI_Comm(); }