Error

-- set path to uuid-ossp.sql (c:/Program Files (x86)/PostgreSQL/8.4/share/contrib/uuid-ossp.sql)
\i 'D:/Program Files (x86)/PostgreSQL/9.0/share/contrib/uuid-ossp.sql'

Reason: uuid-ossi.sql is NOT available in the 64-bit version of PostgreSQL 9.0 [1]