This was resolved by updating the Informix client software, which was at v3.5. It's unfortunate that no errors or warnings are issued if you have SAS v9.4 and don't update to 4.1 or higher. From the Systems Requirements for SAS 9.4 Foundation for Linux for x64: SAS/ACCESS Interface to Informix For SAS 9.4M3 DBMS Product Required: Informix Client SDK 4.10FC4 (64-bit only).
... View more