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-rw-r--r--Carpet/Carpet/src/CallFunction.cc4
1 files changed, 4 insertions, 0 deletions
diff --git a/Carpet/Carpet/src/CallFunction.cc b/Carpet/Carpet/src/CallFunction.cc
index 224a66346..494f2864c 100644
--- a/Carpet/Carpet/src/CallFunction.cc
+++ b/Carpet/Carpet/src/CallFunction.cc
@@ -473,7 +473,11 @@ namespace Carpet {
void CheckFence (cGH const * const cctkGH, cFunctionData * attribute)
{
+ DECLARE_CCTK_PARAMETERS;
+
if (is_meta_mode()) return; // meta mode has no accessible variables
+ // enumerating the grid variables is expensive
+ if (not electric_fence) return;
Timers::Timer timer("FenceCheck");
timer.start();