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- make some changes in project.properties (omit save) - run single --> changes are not considered for this run
Only reproducible when CoS enabled. In J2SEActionProvider: copyMultiValue(J2SEProjectProperties.RUN_JVM_ARGS, execProperties); This picks up values from the PropertyEvaluator, which uses whatever is saved to disk at the time. project.properties gets saved when Ant is run, which comes a bit later. I don't see an obvious fix. Anyway this is hardly a major use case.
This old bug may not be relevant anymore. If you can still reproduce it in 8.2 development builds please reopen this issue. Thanks for your cooperation, NetBeans IDE 8.2 Release Boss