Simulation stop before the end (lastIteration = 500)

[eBimPy]

Hello,
I tried to run a simulation in eqasim-java for synthetic data ile-de-france. in the configuration file I set lastIteration = 500 but the simulation often stops at iteration 85, 86, 87 without reaching the requested 500.
for information: I set lastIteration = 50 to see and this time the simulation went to the end.
In the log file I have this error:

2024-12-19T12:09:25,886 INFO CountsWriterV2:45 Write Counts to simulation_output/ile-de-france-0.1pct/output_counts.xml.gz
2024-12-19T12:09:25,943 INFO ControlerListenerManagerImpl:135 calling notifyShutdown on org.matsim.analysis.ModeChoiceCoverageControlerListener with priority 0.0
2024-12-19T12:09:25,943 INFO ControlerListenerManagerImpl:135 calling notifyShutdown on org.matsim.analysis.ScoreStatsControlerListener with priority 0.0
2024-12-19T12:09:25,943 INFO ControlerListenerManagerImpl:135 calling notifyShutdown on org.matsim.analysis.IterationTravelStatsControlerListener with priority 0.0
2024-12-19T12:09:25,943 INFO PersonWriter:36 Writing all Persons to personscsv
2024-12-19T12:09:26,131 INFO PersonWriter:54 ...done
2024-12-19T12:09:26,131 INFO ControlerListenerManagerImpl:135 calling notifyShutdown on org.matsim.analysis.LinkStatsControlerListener with priority 0.0
2024-12-19T12:09:35,514 INFO ControlerListenerManagerImpl:135 calling notifyShutdown on org.matsim.contribs.discrete_mode_choice.modules.UtilitiesWriterHandler with priority 0.0
2024-12-19T12:09:35,535 INFO ControlerListenerManagerImpl:135 calling notifyShutdown on org.eqasim.core.simulation.analysis.AnalysisOutputListener with priority 0.0
2024-12-19T12:09:35,564 INFO ControlerListenerManagerImpl:138 all ControlerShutdownListeners called.
2024-12-19T12:09:35,564 INFO MatsimRuntimeModifications:103 S H U T D O W N --- shutdown completed.
2024-12-19T12:09:35,564 INFO OutputDirectoryLogging:172 closing the logfile, i.e. messages sent to the logger after this message are not written to the logfile.

Can someone explain to me where S H U T D O W N --- shutdown completed comes from.

Thanks