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This bug was originally marked as duplicate of bug 255406, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE 8.2 (Build 201609300101) VM: Java HotSpot(TM) 64-Bit Server VM, 25.121-b13, Java(TM) SE Runtime Environment, 1.8.0_121-b13 OS: Linux User Comments: GUEST: I was trying to make a GUI program in Python, and decided to run it. When I did so, no window appeared, and this exception popped up. RLN0606: <Please provide a description of the problem or the steps to reproduce> no puedo ejecutar los programas RLN0606: <Please provide a description of the problem or the steps to reproduce>no puedo ejecutar los programas de python que hago? GUEST: I was running my project (it was just having asked to run it: I had just the time to select twice my ain modules) GUEST: Just open the IDE and this show up. Stacktrace: java.lang.NullPointerException at org.netbeans.modules.python.project.ui.actions.RunCommand.invokeAction(RunCommand.java:74) at org.netbeans.modules.python.project.PythonActionProvider$1.run(PythonActionProvider.java:95) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443) at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68) at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)
Created attachment 164017 [details] stacktrace
Thanks for your report. To reproduce this bug, I need more information: - What version of the plugin do you use? - From the stackstrace, I guess you are using an ant project. Can you confirm this? - Can you reproduce the error with new project? - What GUI framework do you use? - Can you provide a minimal project with the error?