[Koha] Field 866 - Textual Holdings does not display in OPAC.

[Nicolas Rucks]

Hi everyone
I am having difficulties with field 866 - Textual Holdings - Basic Bibliographic Unit
We are using koha 17.05.02.000 under Linux.

I have imported some serials records, wich carry holdings information in field 866 (and 863 for test purposes).
Fields 866 and 863 of those records do show up under Koha Staff Client. (.../cgi-bin/koha/catalogue/detail.pl?biblionumber=50159)

But I cannot get to see them under the OPAC (.../cgi-bin/koha/opac-detail.pl?biblionumber=50159)

I already tested modifying a few things on the MARC21slim2OPACDetail.xsl file.
I checked field 866 is there in MARC21slim2OPACDetail.xsl , uncommented.
I can even display some other locally defined fields for test purposes.
But fields 866 863 do not show up.

Am I missing some configuration or is there something else I should check?

Thanks a lot!
Nicolas Rucks
Biblioteca Central
UBA-FCEN

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