EPUB3 to DAISY202

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I tried EPUB3 to DAISY202 conversion on Pipeline2 but received error message.
I validated the epub file on IDPF validation website and the file was valid (http://validator.idpf.org/application/validate).

Anybody have an idea why Pipeline2 couldn't convert the file?

I attach the log.txt from Pipeline2.

Thank you for your support,
Mayu

Dear Mayu:

The log file is not with your comment. Please send it by email or copy and paste.

Prashant