HTML book content creator started

Detecting book name: iot-open2ndpr

Loading ToC from en/iot-open/toc2

Generating HTML source... (working ...)

Media link aria-label (alt→link): 574 links

Wiki media from disk: 587 files (no copy)

Missing on disk (1): en/iot-open/hardware2/esp8684_wroom04.png

Converting main content to tagged PDF... (working ...)

Cover file not found: /data/book/src/iot-open2ndpr-cover.pdf

Back file not found: /data/book/src/iot-open2ndpr-back.pdf

PDF merge aborted — cover and back PDF are required.