I get:

"This installation package could not be opened.
Contact the applicaion vendor to verify that this ia a valid Windows Installer package."

I get this error on my workstation and sever.
   XP Pro SP3
   Windows Server 2003 R2

Hi,

Thanks for considering Aspose.

Could you please again download the latest installer package v 1.6 from http://www.aspose.com/community/files/54/utility-rwocomponents/aspose.workflow/category1118.aspx. I hope you won't get any problem.