make sure that checkpoints are written at multiples of (<last-checkpoint-iteration> + IO::checkpoint_every)

1 files changed, 1 insertions, 1 deletions

diff --git a/Carpet/CarpetIOHDF5/src/CarpetIOHDF5.cc b/Carpet/CarpetIOHDF5/src/CarpetIOHDF5.cc
index c70863069..39eb25342 100644
--- a/Carpet/CarpetIOHDF5/src/CarpetIOHDF5.cc
+++ b/Carpet/CarpetIOHDF5/src/CarpetIOHDF5.cc
@@ -143,7 +143,7 @@ void CarpetIOHDF5_EvolutionCheckpoint (CCTK_ARGUMENTS)
 
   bool const checkpoint_by_iteration =
     checkpoint_every > 0 and
-    iteration >= last_checkpoint_iteration + checkpoint_every;
+    iteration % (last_checkpoint_iteration + checkpoint_every) == 0;
   bool const checkpoint_by_walltime =
     checkpoint_every_walltime_hours > 0 and
     walltime >= last_checkpoint_walltime + checkpoint_every_walltime_hours;