Can Web Viewer 12.1 run on WebSphere?
Can Web Viewer 14.0 run on WebSphere?
Web Viewer 12.1, 14.0
Webviewer 12.1 runs with Websphere and this has been supported since 12.0. You need the full Websphere, not the light version (not Liberty).
Web Viewer 14.0 runs under Websphere Liberty.