I am converting an HTML file to epub 2 using Sigil.
I am using Pagina to check if its a valid epub.
It usually works, though with one book I am getting
ERROR NCX-001 /OEBPS/toc.ncx NCX identifier ('a0d8cc05-8c3c-48ce-ba5e-13722fae684f') does not match OPF identifier ('urn:uuid:a0d8cc05-8c3c-48ce-ba5e-13722fae684f').
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE ncx PUBLIC "-//NISO//DTD ncx 2005-1//EN"
"http://www.daisy.org/z3986/2005/ncx-2005-1.dtd">
relevant files below (generated by Sigil):
<ncx xmlns="http://www.daisy.org/z3986/2005/ncx/" version="2005-1">
<head>
<meta name="dtb:uid" content="a0d8cc05-8c3c-48ce-ba5e-13722fae684f"/>
<meta name="dtb:depth" content="1"/>
<meta name="dtb:totalPageCount" content="0"/>
<meta name="dtb:maxPageNumber" content="0"/>
</head>
<docTitle>
<text>t1</text>
</docTitle>
<navMap>
<navPoint id="navPoint-1" playOrder="1">
<navLabel>
<text>Introduction</text>
</navLabel>
<content src="Text/t1.html"/>
</navPoint>
</navMap>
</ncx>
<?xml version="1.0" encoding="UTF-8"?>
<package xmlns="http://www.idpf.org/2007/opf" unique-identifier="BookID" version="2.0">
<metadata xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns
pf="http://www.idpf.org/2007/opf">
<dc:title>t1</dc:title>
<dc:creator opf:role="aut">wj</dc:creator>
<dc:language>en</dc:language>
<dc:identifier id="BookID" opf:scheme="UUID">urn:uuid:a0d8cc05-8c3c-48ce-ba5e-13722fae684f</dc:identifier>
<meta name="Sigil version" content="0.3.2"/>
</metadata>
<manifest>
<item id="ncx" href="toc.ncx" media-type="application/x-dtbncx+xml"/>
<item id="t1.html" href="Text/t1.html" media-type="application/xhtml+xml"/>
</manifest>
<spine toc="ncx">
<itemref idref="t1.html"/>
</spine>
</package>
Its got me stumped.