Hi I have installed the latest release of Calibre  v2006.4_35.37  in FC3. I'm using it along with cadence virtuoso layout editor. I have had no problems with the DRC and LVS. But when i run PEX the extraction starts and ends with the following error without producing any output netlist.

WARNING: XDB Database not available: No comparison was made.
Unable to restore XDB database.
Error:: restore of XDB failed
--- CREATING XREF INFORMATION FROM XDB DATABASE

ERROR: reading layout to source cross reference

I tried installing the XDB database.. But still the error continues..  Can u help me on this....

thanks and regards
Rakesh