This bug was originally marked as duplicate of bug 122295, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related.

Build: NetBeans IDE Dev (Build 201005192201)
VM: Java HotSpot(TM) Client VM, 16.0-b13, Java(TM) SE Runtime Environment, 1.6.0_18-b07
OS: Windows XP

User Comments:
ulfzibis: after file renaming. See bug 187169.




Stacktrace: 
java.lang.IllegalArgumentException: Duplicate in children list: C:/Projects/Java_Bugs/JDK-7/j_l_Character_names/log/CharacterNamesGenerator7_2b.txt
Children: [MasterFileObject[C:\Projects\Java_Bugs\JDK-7\j_l_Character_names\log\.svn@1806663:10fa3a1,valid=true], MasterFileObject[C:\Projects\Java_Bugs\JDK-7\j_l_Character_names\log\CharacterNamesGenerator6.txt@1242c15:88d1f2,valid=true], MasterFileObject[C:\Projects\Java_Bugs\JDK-7\j_l_Character_names\log\CharacterNamesGenerator7.txt@1ca3a29:8f6724,valid=true], MasterFileObject[C:\Projects\Java_Bugs\JDK-7\j_l_Character_names\log\CharacterNamesGenerator7_0a.txt@1365038:f37078,valid=true], MasterFileObject[C:\Projects\Java_Bugs\JDK-7\j_l_Character_names\log\CharacterNamesGenerator7_0b.txt@1195182:1e06c80,valid=true], MasterFileObject[C:\Projects\Java_Bugs\JDK-7\j_l_Character_names\log\CharacterNamesGenerator7_1a.txt@13943b2:15a3512,valid=true], MasterFileObject[C:\Projects\Java_Bugs\JDK-7\j_l_Character_names\log\CharacterNamesGenerator7_1b.txt@fb68fb:9baec8,valid=
   at org.openide.filesystems.Ordering.getOrder(Ordering.java:101)
   at org.openide.filesystems.FileUtil.getOrder(FileUtil.java:2085)
   at org.openide.loaders.FolderList.carefullySort(FolderList.java:644)
   at org.openide.loaders.FolderList.getObjects(FolderList.java:601)
   at org.openide.loaders.FolderList.access$200(FolderList.java:77)
   at org.openide.loaders.FolderList$1.run(FolderList.java:353)