Okay I'm currently working on a 1200+ page ePub, I just ran it through EPUB checker, it came up with 20+ errors. Yesterday I whittled that down to 2. Those 2 errors are in the same line somewhere but, unfortunately the line is VERY long, it's an entry from the index section.
Now my question is, what/where does the col #value stand for? How do I search via that value so I can know exactly where the problem lies in the long string? Is that a character count? I have tried on fixing it manually, but don't see any errors in the code.
(example: line 71, col 4205)