From df3fad3b491d8ba9d1c596890b39003d5eb2b682 Mon Sep 17 00:00:00 2001
From: Axel Kohlmeyer <akohlmey@gmail.com>
Date: Wed, 18 Sep 2019 14:35:12 -0400
Subject: [PATCH] output number of processors when reporting a mismatch on
 reading a restart

---
 src/read_restart.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/read_restart.cpp b/src/read_restart.cpp
index 3d2e2b6592..62ce209b90 100644
--- a/src/read_restart.cpp
+++ b/src/read_restart.cpp
@@ -734,8 +734,12 @@ void ReadRestart::header(int incompatible)
 
     } else if (flag == NPROCS) {
       nprocs_file = read_int();
-      if (nprocs_file != comm->nprocs && me == 0)
-        error->warning(FLERR,"Restart file used different # of processors");
+      if (nprocs_file != comm->nprocs && me == 0) {
+        char msg[128];
+        snprintf(msg,128,"Restart file used different # of processors: %d vs. %d",
+                 nprocs_file,comm->nprocs);
+        error->warning(FLERR,msg);
+      }
 
     // don't set procgrid, warn if different