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You can uncomment those lines (remove # character) and restart jmeter :
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# Save test plans and test logs in 2.0 format #file_format=2.0 # Just test plans (jmx) #file_format.testplan=2.0 # Just test logs (jtl) #file_format.testlog=2.0 |
More informations about: JmxTestPlan or JtlTestLog