Postgres Reverse Engineering error The Parameter is incorrect

I downloaded latest version of ER Studio last week.

I downloaded latest version of Postgres last week.

I can connect from ER Studio via ODBC on my local windows PC.

ER Studio can see the objects available. I select the tables I want reverse engineered. It goes through them all it appears (as script flies by).

However right at the end it pops up an error 'The parameter is incorrect'.

I unchecked all 'options' such as drive relationships from indexes etc so it becomes the most basic reverse engineer of tables only. No matter - same error.

Thoughts?