1 files changed, 10 insertions, 2 deletions
diff --git a/src/rotatingsymmetry90.c b/src/rotatingsymmetry90.c
index 42776d8..397797f 100644
--- a/src/rotatingsymmetry90.c
+++ b/src/rotatingsymmetry90.c
@@ -1,5 +1,3 @@
-/* $Header$ */
-
 #include <assert.h>
 #include <math.h>
 #include <stdlib.h>
@@ -14,6 +12,8 @@
 
 #include "Slab.h"
 
+#include "rotatingsymmetry90.h"
+
 
 
 /* This is pretty hard coded into all the tensor types and cannot be
@@ -541,6 +541,14 @@ int BndRot90VI (cGH const * restrict const cctkGH,
         assert (0);
       }
       
+      if (CCTK_IsFunctionAliased("GetLocalComponents")) {
+        int const num_local_components = GetLocalComponents(cctkGH);
+        if (num_local_components > 1) {
+          CCTK_WARN (CCTK_WARN_ABORT,
+                     "TAT/Slab can only be used if there is a single local component per MPI process");
+        }
+      }
+      
       options = Util_TableCreateFromString ("useghosts=1");
       assert (options>=0);