java.io.FileNotFoundException: C:\Users\Abdi\.netbeans\7.0beta2\var\cache\index\s68\java\14\refs\_c0.prx (The system cannot find the file specified)
   at java.io.RandomAccessFile.open(RandomAccessFile.java:0)
   at java.io.RandomAccessFile.<init>(RandomAccessFile.java:233)
   at org.apache.lucene.store.SimpleFSDirectory$SimpleFSIndexInput$Descriptor.<init>(SimpleFSDirectory.java:76)
   at org.apache.lucene.store.SimpleFSDirectory$SimpleFSIndexInput.<init>(SimpleFSDirectory.java:97)
   at org.apache.lucene.store.SimpleFSDirectory.openInput(SimpleFSDirectory.java:63)
   at org.apache.lucene.index.SegmentReader$CoreReaders.<init>(SegmentReader.java:136)
   at org.apache.lucene.index.SegmentReader.get(SegmentReader.java:605)
   at org.apache.lucene.index.IndexWriter$ReaderPool.get(IndexWriter.java:622)
   at org.apache.lucene.index.IndexWriter$ReaderPool.get(IndexWriter.java:597)
   at org.apache.lucene.index.DocumentsWriter.applyDeletes(DocumentsWriter.java:1002)
   at org.apache.lucene.index.IndexWriter.applyDeletes(IndexWriter.java:4566)
   at org.apache.lucene.index.IndexWriter.doFlushInternal(IndexWriter.java:3756)
   at org.apache.lucene.index.IndexWriter.doFlush(IndexWriter.java:3595)
   at org.apache.lucene.index.IndexWriter.flush(IndexWriter.java:3585)
   at org.apache.lucene.index.IndexWriter.closeInternal(IndexWriter.java:1717)
   at org.apache.lucene.index.IndexWriter.close(IndexWriter.java:1680)
   at org.apache.lucene.index.IndexWriter.close(IndexWriter.java:1644)
   at org.netbeans.modules.parsing.lucene.LuceneIndex._store(LuceneIndex.java:365)
   at org.netbeans.modules.parsing.lucene.LuceneIndex.access$200(LuceneIndex.java:103)
   at org.netbeans.modules.parsing.lucene.LuceneIndex$1.run(LuceneIndex.java:301)
   at org.netbeans.modules.parsing.lucene.LuceneIndex$1.run(LuceneIndex.java:298)
   at org.netbeans.modules.parsing.lucene.support.IndexManager$1.call(IndexManager.java:103)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:167)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:356)
   at org.netbeans.modules.parsing.lucene.support.IndexManager.writeAccess(IndexManager.java:100)
   at org.netbeans.modules.parsing.lucene.LuceneIndex.store(LuceneIndex.java:298)
   at org.netbeans.modules.java.source.usages.PersistentClassIndex$PIWriter.deleteAndStore(PersistentClassIndex.java:420)
   at org.netbeans.modules.java.source.usages.SourceAnalyser.store(SourceAnalyser.java:136)
   at org.netbeans.modules.java.source.indexing.JavaCustomIndexer$1.run(JavaCustomIndexer.java:252)
   at org.netbeans.modules.java.source.indexing.JavaCustomIndexer$1.run(JavaCustomIndexer.java:161)
   at org.netbeans.modules.java.source.usages.ClassIndexManager.prepareWriteLock(ClassIndexManager.java:120)
   at org.netbeans.modules.java.source.indexing.JavaCustomIndexer.index(JavaCustomIndexer.java:161)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor$2.run(Indexable.java:153)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runIndexer(RepositoryUpdater.java:256)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor.index(Indexable.java:151)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$RefreshCifIndices.getDone(RepositoryUpdater.java:2507)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doTheWork(RepositoryUpdater.java:2159)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task._run(RepositoryUpdater.java:3830)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.run(RepositoryUpdater.java:3769)
   at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:610)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
   at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
   at java.util.concurrent.FutureTask.run(FutureTask.java:166)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
   at java.lang.Thread.run(Thread.java:717)