We just moved from Scientific Linux to Ubuntu, and as a result have moved from FillPDF Local Server to locally installed PDFtk.
All PDFs that are generated are now 0 bytes. There are no related errors showing up in the Drupal logs, and in fact I see a notice from the FillPDF module that
the PDF was created (User generated form "nbca_archival_reproduction_agreement.pdf" for node "NBCA Reproduction Form".).
I'm also not seeing any errors in the server logs either.
Has anyone else encountered this problem? Any advice would be greatly appreciated.