Akira Kakuto Fri, 01 Dec 2017 14:08:30 -0800
Dear Knut,
BTW: In my tests xelatex fails to include more than 5005 pdfs correctly.
This is a bug, which I introduced years ago, in xdvipdfmx. I had fixed the bug this year. Please wait for the TL 2018. Best, Akira