java.lang.AssertionError: java.io.IOException: Not an NBM project in F:\prace\hg\main\core
        at org.netbeans.modules.apisupport.project.queries.GlobalSourceForBinaryImpl.findSourceRoots(GlobalSourceForBinaryImpl.java:148)
        at org.netbeans.api.java.queries.SourceForBinaryQuery.findSourceRoots(SourceForBinaryQuery.java:89)
        at org.netbeans.modules.java.source.classpath.GlobalSourcePath.createResources(GlobalSourcePath.java:302)
        at org.netbeans.modules.java.source.classpath.GlobalSourcePath.access$2200(GlobalSourcePath.java:96)
        at org.netbeans.modules.java.source.classpath.GlobalSourcePath$SourcePathImplementation.getResources(GlobalSourcePath.java:596)
        at org.netbeans.api.java.classpath.ClassPath$SPIListener.propertyChange(ClassPath.java:902)
        at org.openide.util.WeakListenerImpl$PropertyChange.propertyChange(WeakListenerImpl.java:186)
        at org.netbeans.modules.java.source.classpath.GlobalSourcePath$SourcePathImplementation.firePropertyChange(GlobalSourcePath.java:645)
        at org.netbeans.modules.java.source.classpath.GlobalSourcePath$1.run(GlobalSourcePath.java:233)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:561)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:986)
java.io.IOException: Not an NBM project in F:\prace\hg\main\core
        at org.netbeans.modules.apisupport.project.universe.ModuleList$1.run(ModuleList.java:161)
        at org.netbeans.modules.apisupport.project.universe.ModuleList$1.run(ModuleList.java:153)
        at org.openide.util.Mutex.readAccess(Mutex.java:291)
        at org.netbeans.modules.apisupport.project.universe.ModuleList.getModuleList(ModuleList.java:152)
        at org.netbeans.modules.apisupport.project.universe.ModuleList.getModuleList(ModuleList.java:136)
        at org.netbeans.modules.apisupport.project.universe.TestEntry.getNetBeansOrgPath(TestEntry.java:187)
        at org.netbeans.modules.apisupport.project.universe.TestEntry.getSrcDir(TestEntry.java:139)
        at org.netbeans.modules.apisupport.project.queries.GlobalSourceForBinaryImpl.findSourceRoots(GlobalSourceForBinaryImpl.java:106)
        at org.netbeans.api.java.queries.SourceForBinaryQuery.findSourceRoots(SourceForBinaryQuery.java:89)
        at org.netbeans.modules.java.source.classpath.GlobalSourcePath.createResources(GlobalSourcePath.java:302)
        at org.netbeans.modules.java.source.classpath.GlobalSourcePath.access$2200(GlobalSourcePath.java:96)
        at org.netbeans.modules.java.source.classpath.GlobalSourcePath$SourcePathImplementation.getResources(GlobalSourcePath.java:596)
        at org.netbeans.api.java.classpath.ClassPath$SPIListener.propertyChange(ClassPath.java:902)
        at org.openide.util.WeakListenerImpl$PropertyChange.propertyChange(WeakListenerImpl.java:186)
        at org.netbeans.modules.java.source.classpath.GlobalSourcePath$SourcePathImplementation.firePropertyChange(GlobalSourcePath.java:645)
        at org.netbeans.modules.java.source.classpath.GlobalSourcePath$1.run(GlobalSourcePath.java:233)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:561)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:986)