The Progress native client is a Progress Software product that provides access to Progress databases via the Progress proprietary communications protocol.
The SQL-89 version of this product is called Progress® Client Networking, and may be used for connections to Progress 9.1 and earlier.
The SQL-92 version of this product is called Progress® SQL-92 Client Access, and may be used for connections to Progress 9.1 and later, including
The Progress® Client Networking or Progress® SQL-92 Client Access version should match the target Progress server version as closely as possible.
Major-version is the minimum requirement; dot-version is better; letter-version is better still.