This bug was originally marked as duplicate of bug 182069, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related.

Build: NetBeans IDE 6.9 (Build 201006101454)
VM: Java HotSpot(TM) Client VM, 16.3-b01, Java(TM) SE Runtime Environment, 1.6.0_20-b02
OS: Windows XP

User Comments:
Baiazid: just switched to another file opened (in tabs)




Stacktrace: 
java.lang.IllegalArgumentException: TreePathHandle [C:\Documents and Settings\mircea.stanciu\My Documents\NetBeansProjects\JBase\sources\webapp-jsf\src\main\java\com\flowconnect\crc\persistence\hibernate\CrcTranslationDAO.java] was not created from C:\Documents and Settings\mircea.stanciu\My Documents\NetBeansProjects\JBase\sources\webapp-jsf\src\main\java\com\flowconnect\crc\persistence\hibernate\CrcTranslationDAO.java
mine: id=MasterFileObject[C:\Documents and Settings\mircea.stanciu\My Documents\NetBeansProjects\JBase\sources\webapp-jsf\src\main\java\com\flowconnect\crc\persistence\hibernate\CrcTranslationDAO.java@17c85d7:113bedb,valid=true], url=file:/C:/Documents%20and%20Settings/mircea.stanciu/My%20Documents/NetBeansProjects/JBase/sources/webapp-jsf/src/main/java/com/flowconnect/crc/persistence/hibernate/CrcTranslationDAO.java
remote: id=MasterFileObject[C:\Documents and Settings\mircea.stanciu\My Documents\NetBeansProjects\JBase\sources\webapp-jsf\src\main\java\com\flowconnect\crc\persistence\hibernate
   at org.netbeans.api.java.source.TreePathHandle$TreeDelegate.resolve(TreePathHandle.java:424)
   at org.netbeans.api.java.source.TreePathHandle.resolve(TreePathHandle.java:154)
   at org.netbeans.modules.java.editor.semantic.RemoveUnusedImportFix$1.run(RemoveUnusedImportFix.java:119)
   at org.netbeans.modules.java.editor.semantic.RemoveUnusedImportFix$1.run(RemoveUnusedImportFix.java:111)
   at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:665)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:154)