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Here's the trace, hope it helps. java.lang.RuntimeException: java.lang.ClassCastException: org.netbeans.jmi. javamodel.JavaPackage$Impl at org.netbeans.modules.java.hints.JavaHintsProvider. getHints(JavaHintsProvider.java:149) [catch] at org.netbeans.modules.editor.hints.HintsOperator$HintPopupTaskImpl. run(HintsOperator.java:236) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:471) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java: 904) Caused by: java.lang.ClassCastException: org.netbeans.jmi.javamodel. JavaPackage$Impl at org.netbeans.modules.javacore.jmiimpl.javamodel.MetadataElement. getASTree(MetadataElement.java:1157) at org.netbeans.modules.javacore.jmiimpl.javamodel.MetadataElement. getASTree(MetadataElement.java:515) at org.netbeans.modules.javacore.parser.ResourceInfo. refreshASTree(ResourceInfo.java:77) at org.netbeans.modules.javacore.jmiimpl.javamodel.MetadataElement. getASTree(MetadataElement.java:1146) at org.netbeans.modules.javacore.jmiimpl.javamodel.MetadataElement. getASTree(MetadataElement.java:515) at org.netbeans.modules.javacore.jmiimpl.javamodel.MetadataElement. getPosition(MetadataElement.java:521) at org.netbeans.modules.javacore.jmiimpl.javamodel.ElementFinder. getElementByOffset(ElementFinder.java:37) at org.netbeans.modules.javacore.jmiimpl.javamodel.ResourceImpl. getElementByOffset(ResourceImpl.java:1655) at org.netbeans.modules.java.hints.JavaHintsProvider. getHints(JavaHintsProvider.java:121) ... 3 more System Info: ************ Product Version = NetBeans IDE 5.0 Beta 2 (Build 200511141730) Operating System = Windows XP version 5.1 running on x86 Java; VM; Vendor; Home = 1.5.0_04; Java HotSpot(TM) Client VM 1.5.0_04-b05; Sun Microsystems Inc.; System Locale; Encoding = hr_HR (nb); Cp1250
*** This issue has been marked as a duplicate of 68695 ***
Reorganization of java component