+ bug-hunt for weird error "CheckOccurrences failed" from genios/badz03
- underlying cause seems to be bibl-field overflow from badz03/../../ddc_xml/data/2009/01/BADZ_5127408954.ddc.xml
- v2.1.25 aborts early with error "Value for bibl field `bibl' is too long (33341 bytes > max=20000 bytes)"