Index not found

I've deleted all my sites in my jahia, since that operation when I create or import a new site I have repetitive errors in the console related to search indexes

2009-03-11 04:56:50,197: INFO [org.jahia.services.search.lucene.AbstractLuceneSearchIndexer] - Error calling storeInPersistance o
n indexer
java.io.FileNotFoundException: C:\Tomcat\webapps\jahia\WEB-INF\var\search_indexes\mySite_7.fnm (Le fichier spÚcifiÚ est introuvab
le)
at java.io.RandomAccessFile.open(Native Method)
at java.io.RandomAccessFile.<init>(RandomAccessFile.java:212)
at org.apache.lucene.store.FSDirectory$FSIndexInput$Descriptor.<init>(FSDirectory.java:506)
at org.apache.lucene.store.FSDirectory$FSIndexInput.<init>(FSDirectory.java:536)
at org.apache.lucene.store.FSDirectory.openInput(FSDirectory.java:445)
at org.apache.lucene.store.FSDirectory.openInput(FSDirectory.java:440)
at org.apache.lucene.index.FieldInfos.<init>(FieldInfos.java:57)
at org.apache.lucene.index.SegmentReader.initialize(SegmentReader.java:298)
at org.apache.lucene.index.SegmentReader.get(SegmentReader.java:262)
at org.apache.lucene.index.SegmentReader.get(SegmentReader.java:197)
at org.apache.lucene.index.MultiSegmentReader.<init>(MultiSegmentReader.java:55)
at org.apache.lucene.index.DirectoryIndexReader$1.doBody(DirectoryIndexReader.java:75)
at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:636)
at org.apache.lucene.index.DirectoryIndexReader.open(DirectoryIndexReader.java:63)
at org.apache.lucene.index.IndexReader.open(IndexReader.java:209)
at org.apache.lucene.index.IndexReader.open(IndexReader.java:192)
at org.jahia.services.search.lucene.AbstractLuceneSearchIndexer.getIndexReader(AbstractLuceneSearchIndexer.java:529)
at org.jahia.services.search.lucene.AbstractLuceneSearchIndexer$Indexer.storeInPersistance(AbstractLuceneSearchIndexer.jav
a:944)
at org.jahia.services.search.lucene.AbstractLuceneSearchIndexer.run(AbstractLuceneSearchIndexer.java:379)
at java.lang.Thread.run(Thread.java:619)