SYMPTOM:
For a particular user, the following error occurs when executing reports in Strategy Developer 9.4.1 and 10.x:

SQL Generation Complete QueryEngine encountered error: Connect failed. Error type: Odbc error. Odbc operation attempted: SQLDriverConnect. Invalid username/password; logon denied.

ACTION:
Disable the Warehouse Passthrough option for the user or apply the correct warehouse login to access the data.