How do i put the absolute path for the css and any png file on the command line. for instance my code below is calling the prince to use the operation2.css which is in a different directory .

system ("prince srr-title.html srr-$my_month-$my_year.html srr-$my_month-$my_year-error.html -s 'I:\\Operations\\operation2.css' -o srr-$my_month-$my_year.pdf");

That looks fine, is it not working? Do you get any errors or warnings from Prince?