Reference Projects are not supported for Routes and Routelets [TESB-17442] - 6.2

Talend ESB Release Notes

Talend ESB
Installation and Upgrade
Talend Activity Monitoring Console
Talend Administration Center
Talend Artifact Repository
Talend CommandLine
Talend ESB
Talend Identity Management
Talend Installer
Talend JobServer
Talend Log Server
Talend Project Audit
Talend Runtime
Talend Studio

The Mediation perspective is merged into the Integration perspective and the repositories of the two perspectives are also combined into one. In this release, referenced project artifacts in Routes and Routelets are not supported. It will be enhanced in the future release to be available in the Route Builder.