Hello, the file `NEWS` contains 1.40.15 as date of introduction for \pdfsuppresswarningpagegroup: pdfTeX 3.14159265-2.6-1.40.15 (TeX Live 2014) - changes: - sync with Knuth TeX 3.14159265, e-TeX 2.6 - new warning-suppression parameter \pdfsuppresswarningpagegroup But the documentation says The primitive was introduced in pdfTEX 1.40.14. Yours sincerely Heiko Oberdiek