Thread: EPUB file fails to open in KOReader on Onyx Boox Note Air 3 (opens fine in NeoReader)
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Old 09-06-2025, 08:59 AM   #2
Doitsu
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The Epub is invalid, because the OPF file contains multiple duplicate ids.
The OPF file also has a size of 40 MB(!) and contains 650K(!) lines.
I'm really surprised that you ware able to open it with Onyx NeoReader.
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