Why can't I access the full text of PCTs?

The problem here is that the data is not available in the EP full-text database (because it is in TXTWOx format). Unlike Espacenet, OPS does not simplify the next step needed.

To find out where the relevant full text can be found, you have to follow the business rules for PCTs:

• http://ops.epo.org/rest-services/published-data/publication/docdb/EP1855551.B1/fulltext (conclusion: no information, so check family or equivalents)
• http://ops.epo.org/rest-services/published-data/publication/docdb/EP1855551.B1/equivalents
• http://ops.epo.org/rest-services/family/publication/docdb/EP1855551.B1 (conclusion: long list - try the WO number with is-representative=yes)
• http://ops.epo.org/rest-services/published-data/publication/docdb/WO2006094475/fulltext (conclusion: yes, there is a full text)
• http://ops.epo.org/rest-services/published-data/publication/docdb/WO2006094475/description
• http://ops.epo.org/rest-services/published-data/publication/docdb/WO2006094475/claims