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-rw-r--r--src/NaNCheck.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/NaNCheck.c b/src/NaNCheck.c
index ad854c0..51cf302 100644
--- a/src/NaNCheck.c
+++ b/src/NaNCheck.c
@@ -316,7 +316,7 @@ int NaNChecker_CheckVarsForNaN (const cGH *GH,
/* save the iteration of the last call */
last_iteration_output = GH->cctk_iteration;
- if (info.count > 0)
+ if (info.count > 0 && info.action_if_found)
{
/* if NaNs were found then output NaN mask with the 'IOHDF5' I/O method */
if (info.NaNmask && info.bitmask)