unicode

Hai,
   I am getting the following error message. I can't disclose the source
which caused this error as the source is an proprietary information. In
case some one knows the reason which might cause this error, please help
me. Thanks in advane.

Error : Can't find unicode character property definition via main->i or
i.pl at unicode/Is/i.pl line 209.


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Thanks and Regards,
Rajanikanth