SUMMARY:
This document describes an issue that makes the "[DataDirect][ODBC lib] Specified driver could not be loaded" error appear. This happened using a Vertica driver in a Red Hat Linux 7 environment.
SYMPTOM:
After creating a Vertica DSN and creating a new project using a Database instance that points to this DSN, the user tries to open the Warehouse Catalog and gets the following error:

Error Message
Error type: Odbc error. Odbc operation attempted: SQLDriverConnect. [IM003:0: on SQLHANDLE][DataDirect][ODBC lib] Specified driver could not be loaded. Do you want to modify the Warehouse Catalog Browser options to try solve this problem? Please re-run the Warehouse Catalog Browser after you make your changes.