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-rw-r--r--src/setup_epsdis.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/setup_epsdis.c b/src/setup_epsdis.c
index 498f8c3..8703c63 100644
--- a/src/setup_epsdis.c
+++ b/src/setup_epsdis.c
@@ -196,6 +196,10 @@ setup_epsdis (CCTK_ARGUMENTS)
zmin=odz-maxrad;
zmax=odz+maxrad;
+ assert (cctk_nghostzones[0]>=2);
+ assert (cctk_nghostzones[1]>=2);
+ assert (cctk_nghostzones[2]>=2);
+
npts=0;
for (i=2;i<ni-2;i++)
for (j=2;j<nj-2;j++)