Choral Public Domain Library

I created page Sammlung leicht ausführbarer vierstimmiger Gesänge (Joseph Heinrich Breitenbach) and copied section from another page (where all works perfectly). But now I get the messages:

Warning: asort() expects parameter 1 to be array, null given in /home/choralwi/public_html/wiki/extensions/DynamicPageList/DPL.php on line 725
Warning: Invalid argument supplied for foreach() in /home/choralwi/public_html/wiki/extensions/DynamicPageList/DPL.php on line 728

Please help; I don't know, what to do.

I am working on it.

I have fixed the problem. It was in the code for MultiPubList; the publication page was correctly formatted.
Please let me know on this forum (or barky5 at earthlink.net) if you see other problems with MultiPubList.
Thank for your patience.