Can you please double check the following item in the docs/changes.html? >Since JMeter 2.12, active threads in all thread groups and active threads in >current >thread group are saved by default to CSV or XML results, see Bug 57025 . >If you want to revert to previous behaviour, set property >jmeter.save.saveservice.thread_counts=true
I guess it should read "to revert ... set property ...=false". - Vladimir
