1 files changed, 6 insertions, 0 deletions
diff --git a/src/PughUtils.c b/src/PughUtils.c
index 5bb9238..1c9eabf 100644
--- a/src/PughUtils.c
+++ b/src/PughUtils.c
@@ -56,6 +56,12 @@ const int *PUGH_Topology (const cGH *GH, int dim)
 {
   pGH *pughGH;
 
+
+  if (dim <= 0)
+  {
+    CCTK_WARN (0, "Illegal dimension");
+  }
+
   pughGH = PUGH_pGH (GH);
 
   return pughGH->Connectivity[dim-1]->nprocs;