Scheduling to PDF - File name issue

Hi All,

       When I schedule the Webi report and set to export as PDF on file system with "Use specific name" in the destination tab as %SI_NAME%, the pdf file is generated with some extra characters in the name. For example if my report name is XYZ then it will create pdf file as XYZ_9857944747736522348.pdf

      Has anyone else come across this issue? Is this an issue with BO 4.0 that its encrypting the name? We are using BO 4.0 sp4.