I do not know the answer to this problem in particular, but perhaps it is 
worth checking the main document *and* the bibliography for invisible 
control characters (e.g. `\X{A0}`). They tend to cause all sorts of strange 
problems that result in random error msgs.

On Monday, February 27, 2023 at 8:16:20 AM UTC-3 Peter Vedal Utnes wrote:

> We have a workflow in Open Journal Systems where we use Pandoc to convert 
> word documents to EPUB, and then display them with an embedded EPUB app 
> (Bibi). 
>
> Our resulting EPUBs work fine with both debuggers and viewers like 
> calibre. They work in Bibi, but only when they are reduced to a certain 
> length. Whenever the files exceed approx 100 lines or 600 words, Bibi 
> claims:
>
> TypeError: Cannot read properties of undefined (reading ‘getAttribute’)
>
> Meanwhile, the same documents works when converted to EPUB using other 
> converters, or when I reduce the length (length, not size in bytes-- I've 
> tried with graphics, still works). It suddenly works when I reduce the 
> length by removing pure paragraph text, even though all the formatted 
> elements (abstract, references, etc) are the same. 
>
> I recognize that this problem is very specific to the interrelation pandoc 
> <-> Bibi, but I'd be grateful for general troubleshooting suggestions. 
>
> Thanks in advance, 
>
> Peter
>
>

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