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This bug was originally marked as duplicate of bug 247489, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE 8.1 (Build 201510222201) VM: Java HotSpot(TM) 64-Bit Server VM, 25.66-b18, Java(TM) SE Runtime Environment, 1.8.0_66-b18 OS: Windows 7 User Comments: GUEST: change branch on git, and one of opened projects is removed from filesystem. Stacktrace: java.lang.NullPointerException at org.openide.filesystems.FileUtil.toFile(FileUtil.java:821) at org.netbeans.modules.maven.model.Utilities.createModelSource(Utilities.java:187) at org.netbeans.modules.maven.model.Utilities.createModelSource(Utilities.java:181) at org.netbeans.modules.maven.model.Utilities.performPOMModelOperations(Utilities.java:287) at org.vaadin.netbeans.impl.VaadinSupportImpl.getPomWidgetsets(VaadinSupportImpl.java:567) at org.vaadin.netbeans.impl.VaadinModelImpl.findGwtXml(VaadinModelImpl.java:174)
Created attachment 157897 [details] stacktrace
vaadin passed null for a pom.xml fileobject into org.netbeans.modules.maven.model.Utilities.performPOMModelOperations please report against plugin owner