I use pdftk for filling forms. and now when I enter
F:\GoogleDisk\projects\comparepdfs>pdftk new/file.pdf
fill_form new/b2bf7150aa9de8b2ef8edd20a5677f7f.fdf output new/temp_b2bf7150aa9de8b2
ef8edd20a5677f7f.pdf
returned
Warning: input PDF is not an acroform, so its fields were not filled.
How fix it or convert PDF to acroform?