By the way, even with this error calibre has not issues opening the generate epub file. Maybe this is just a false alarm by epubcheck?
Best regards, Lars 2014-02-18 14:45 GMT+01:00 Lars Vogel <lars.vo...@gmail.com>: > Thanks everyone for the help. I think my setup is the same as Richard > posted it. > > I now tried Java 7 as well as Java 8 but I get the same error. I'm using > Ant version 1.9.2 is case that is relevant. > > Best regards, Lars > > > 2014-02-18 13:14 GMT+01:00 Christian Roth <r...@visualclick.de>: > > Hi, >> >> Maybe the cause for the issue is the filesystem used to create the >> zip-file, because filesystems other than EFS add the additional metadata, >> which raises the validation error "Extra field length for first filename >> must be 0, but was 20". >> >> >> I don't know if this info applies or is relevant, but I am/was getting >> this error when running Java's ZIP implementation in Java 8 (dev) on Mac OS >> X (openjdk 8) for building my EPUB. >> >> When I switched back to Java 7 (u40 and later, openjdk 7 Mac), the error >> simply went away with no code changes on my part whatsoever. >> >> I tried to trace the code in openjdk 8 Mac in trying to pinpoint the >> issue so that I could report it to the openjdk 8 Java folks, but it turned >> out to be way over my head. In my Java code, I am not setting any data in >> the extra field of a new ZipEntry for the mimetype file, so I do think that >> it's a bug in Java 8 ZIP utils library when as a result, the extra field >> length is NOT zero. >> >> Lars, what Java version on which platform are you running Ant in? >> >> Regards >> Christian >> >> >
