Loading the data model incompletely was the source of a number of those dml errors, I found. In most cases I just loaded the relevant *.sql files into Postgres and steamed ahead.
I loaded
- homepages.sql
- postgres-pgtcl.sql
- partner.sql
manually.
There may be more. At present, I am assuming its a local problem - slow machine/ loose nut on keyboard, but will find some time to look more closely at the load-data-models.sql.