question

When running an experiment, FlexSim spawns new child processes for each replication. When a replication finishes, it runs its own EndOfReplication from the child process. Then the parent process also runs EndOfReplication.

This is by design and allows you to do different behaviors if you need to access the child process or the parent process. That third parameter, the childexpfolder, whether it exists or not is what tells us whether it is a child process or parent process calling the trigger.

if (objectexists(childexpfolder)) {
    // End of Replication on the main process
}
else {
    // End of Replication on the child process
}