In my book, all nullpointers are bugs...I hit some kind of drools bug. Is this from jboss tools or??.... | java.lang.NullPointerException | at org.drools.eclipse.refactoring.DRLProjectDetector.detect(DRLProjectDetector.java:39) | at org.drools.eclipse.refactoring.DRLProjectDetector.detect(DRLProjectDetector.java:26) | at org.drools.eclipse.refactoring.RuleSourceFieldRenameParticipant.checkConditions(RuleSourceFieldRenameParticipant.java:64) | at org.eclipse.ltk.core.refactoring.participants.ProcessorBasedRefactoring.checkFinalConditions(ProcessorBasedRefactoring.java:257) | at org.eclipse.ltk.core.refactoring.Refactoring.checkAllConditions(Refactoring.java:160) | at org.eclipse.jdt.internal.ui.refactoring.RefactoringExecutionHelper$Operation.run(RefactoringExecutionHelper.java:80) | at org.eclipse.jdt.internal.core.BatchOperation.executeOperation(BatchOperation.java:39) | at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:728) | at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1800) | at org.eclipse.jdt.core.JavaCore.run(JavaCore.java:4694) | at org.eclipse.jdt.internal.ui.actions.WorkbenchRunnableAdapter.run(WorkbenchRunnableAdapter.java:106) | at org.eclipse.jface.operation.ModalContext$ModalContextThread. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4256061#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...