Originally Posted by thunderune
"ERROR: /Users/thunderrune/Desktop/E.S. Wynn-Pink Carbide.epub: length of first filename in archive must be 8, but was 9"
Does that happen when you zip only the modified file
into the original ePUB? Valid ePUB files are required to have the "mimetype" file zipped first and uncompressed. If you update only the modified files, the "mimetype" should remain unchanged and therefore the ePUB should remain valid. If the zip program does not behave in this way, it's probably not a bug, but it's weird. If, on the other hand, you are zipping again the whole contents of the original ePUB, don't do that, and update only the modified *.opf file instead.