D2K Report Previewer Generate to PDF fil

I have Oracle D2k Report Builder 3.0.5.8.0.
When i run an REP file having some formula columns in it gives the output in the report previewer. When I try to generate into PDF format by File – Generate to file PDF it gives an error
‘REP-1249: Column has no PL/SQL formula’.

I can generate the PDF file through Report Builder but my purpose is to generate PDF file form user side through Report Previewer.

Sajayan