Error compiling into a graph

[Pavi]

Hello,

I'm trying to compile my osm data into a graph but i'm left with this error :

Traceback (most recent call last):

  File "gdb_import_osm.py", line 118, in <module>

    main()

  File "gdb_import_osm.py", line 109, in main

    osmdb = OSMDB( osmdb_filename )

  File "/usr/local/lib/python2.7/dist-packages/graphserver-1.0.0-py2.7.egg/graphserver/ext/osm/osmdb.py", line 88, in __init__

    self.index = Rtree( dbname )

  File "/usr/local/lib/python2.7/dist-packages/rtree/index.py", line 237, in __init__

    self.handle = core.rt.Index_Create(self.properties.handle)

  File "/usr/local/lib/python2.7/dist-packages/rtree/core.py", line 25, in check_void

    raise RTreeError(msg)

rtree.core.RTreeError: Error in "Index_Create": Spatial Index Error: IllegalStateException: SpatialIndex::DiskStorageManager: Failed reading pageSize.

Can anyone tell me what' wrong ?

Many thanks