You are right about Cognos not supporting InterBase on VAX/OpenVMS, but that's because Borland did not produce a VAX version of InterBase. Borland did produce a version of InterBase 4 for AXP/openVMS, but there need to be some changes to make it work with PowerHouse. According to Cognos Support (latest info september 1998) they are now working on a PH compatible version.