Hi @asmecher,
Thank you very much for your reply. I have double-checked the XML schema and I think it is correct. Also tried this test XML and this simplifyed version, but I got the same result:
<?xml version="1.0"?>
<issue xmlns="http://pkp.sfu.ca" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" published="1" current="1" access_status="1" url_path="" xsi:schemaLocation="http://pkp.sfu.ca native.xsd">
<issue_identification>
<volume>1</volume>
<number>2</number>
</issue_identification>
<date_published>2020-06-25</date_published>
<last_modified>2020-06-25</last_modified>
<sections>
<section ref="ART" seq="0" editor_restricted="0" meta_indexed="1" meta_reviewed="1" abstracts_not_required="0" hide_title="0" hide_author="0" abstract_word_count="0">
<id type="internal" advice="ignore">45</id>
<abbrev locale="en_US">ART</abbrev>
<policy locale="en_US">Section default policy</policy>
<title locale="en_US">Articles</title>
</section>
</sections>
<issue_galleys xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://pkp.sfu.ca native.xsd"/>
<articles xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://pkp.sfu.ca native.xsd">
<article xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" date_submitted="2020-06-25" status="3" submission_progress="0" current_publication_id="6" stage="production">
<publication xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" locale="en_US" version="1" status="3" primary_contact_id="16" url_path="" seq="0" date_published="2020-06-25" section_ref="ART" access_status="0" xsi:schemaLocation="http://pkp.sfu.ca native.xsd">
<title locale="en_US">title2</title>
<abstract locale="en_US"><p>abstract</p></abstract>
<copyrightHolder locale="en_US">blaaa</copyrightHolder>
<copyrightYear>2020</copyrightYear>
<authors xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://pkp.sfu.ca native.xsd">
<author include_in_browse="true" user_group_ref="Author" seq="0" id="16">
<givenname locale="en_US">name3</givenname>
<familyname locale="en_US">name5</familyname>
<country>SE</country>
<email>bla@bla.com</email>
</author>
</authors>
<pages>3</pages>
</publication>
</article>
</articles>
</issue>
Thanks for your help. Regards,
Daniel