[Tex/LaTex] pdf/a – validation problem – The F key is missing

convertpdfpdf-a

I tried to convert my thesis from Latex to required pdf/a – version 2u. However, two problem occured from a validation test.

Firt one: "The key F is required but missing."
I failed with googling it, i think that it has maybe something to do with links. I came across one forum, but I do not understand (probably they are not working in LaTeX) – https://forums.adobe.com/thread/1023316
Then, I tried to find the sollution on our forum, but no one had really the same problem. E.g. I tried to use sollution from this post PDF/A with hyperref on TeX Live 2013, but the validator told me, that I have pdf1.4, not even pdf/A.
Does anybody know, what should I change to get rid of this "F key" or how to deal with it?

Second problem, which is probably not so important: The document contains hidden, invisible, non-viewable or non-printable annotations.
I don't know, what they mean by that exactly. Is there a problem with my notes (meaning text starting with %). Does anybody know the sollution?

My code in preambule, packages used are at the end: 

    \documentclass[openany,hidelinks]{book}  
    \usepackage[utf8]{inputenc}  
    \usepackage[T1]{fontenc}  
    \usepackage[czech]{babel}  
    \usepackage{fancyhdr}  
    \usepackage{float}   

    \usepackage{graphicx}  
    \usepackage{amsmath,amssymb,amsthm}  
    \usepackage{color}  
    \usepackage[round]{natbib}  
    \usepackage{hyperref}  
    \usepackage{bookmark}  
    \usepackage[normalem]{ulem}    

    \newcommand{\myand}{\&\ }

    \usepackage[acronym]{glossaries}  
    \makeglossaries  

    \useunder{\uline}{\ul}{}  
    \numberwithin{equation}{chapter}  

    \usepackage{longtable}     
    \usepackage{array}  
    \usepackage{regexpatch}  
    \makeatletter  
    \xpatchparametertext\@cline{-}{\cA-}{}{}  
    \usepackage{placeins}   
    \usepackage{booktabs}  
    \usepackage{caption}   

    \usepackage{pdfpages}   

    %for pdfA  
    \usepackage{xmpincl}  
    \usepackage[a-2u]{pdfx}  
    \usepackage{lmodern}  
    \usepackage{textcomp}

I would be very grateful for every answer! 🙂 Thank you.

The problem is with my bibliography! Another validator gave me exact pages of the problems. And it looks like this: root/document[0]/pages[54](825 0 obj PDPage)/annots[16](821 0 obj PDAnnot)
error_1
Second error has this description:
root/document[0]/pages[64](935 0 obj PDPage)/contentStream[0](936 0 objPDContentStream)/operators[556]/font[0](BCVKHY+LMMathSymbols10-Regular)

root/document[0]/pages[64](935 0 obj PDPage)/contentStream[0](936 0 objPDContentStream)/operators[611]/font[0](HVVRCK+LMMathSymbols7-Regular)

Best Answer

It is sufficent to add option pdfa to package hyperref. (as suggested by @heikooberdiek)

Related Question