updated to pdf creator v 2.4.0 b 213 on both windows 10 and Vista Home Basic.
But somehow it does not print an existing pdf into a pdf-a ?
The test print works and printing of another document (for example a doc) into pdf-a also.
Have installed v 2.1.1 b 820 on another windows 10 computer and all works fine.
Tried to check the various settings but cannot find the difference. Installed ghoscript 9.2 on top but no good.
we are looking into this, so far I can only say it seems to happen for all files printed from Adobe Reader DC (and potentially other Adobe products). Printing from any other viewer created a proper PDF/A in our tests. Hopefully we will find a better solution than going back to Ghostscript 9.10 again.