RTDS 4.0 incompatibility with 15.0.2

Sybase Real-Time Data Service (RTDS) version 4.0 is not certified on Adaptive Server 15.0.2. If you have RTDS 4.0, and you upgrade Adaptive Server to version 15.0.2, RTDS messaging stops. To use the RTDS feature, upgrade to RTDS 4.5.