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:



    \newcommand{\myand}{\&\ }





    %for pdfA  

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)

  • 1
    It is impossible to debug something like this without a complete example -- and when you have a complete example you should make an effort to make a small complete example. – Ulrike Fischer May 10 '18 at 17:58
  • @UlrikeFischer I am very sorry, but I do not know what you mean by example, example of what if not of the code. Thanks :) – Lenka Tom May 10 '18 at 18:01
  • @UlrikeFischer I have edited my post, i hope that I did it the way you meant – Lenka Tom May 10 '18 at 19:12
  • 3
    Add optionpdfa to package hyperref. The option adds some few warnings and settings for greater compliance to PDF/A. It also sets the /F key in link annotations. – Heiko Oberdiek May 10 '18 at 19:15
  • @HeikoOberdiek Wow, it helped! The main error is gone, thank you a lot! :) – Lenka Tom May 10 '18 at 19:35

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


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