[eluser]kaejiavo[/eluser]
I made some tests and only get this error message, if the column is not in the db.
So i would check for these possible error sources
1. you have created the field in the wrong table by accident
2. you have created the field in the wrong database (e.g. dev db and CI is connecting to test db)
3. you have a typo in the field name
4. you have not applied the change to the database yet (happened to me a few times using mysql workbench)
Marco