No, I'm sorry there isn't. The onError method should catch this though. There is also the undocumented waitForOpen promise (I think it's at app.model.waitForOpen), that probably would work (I haven't tested).

You don't need to open a separate web socket to get the app list. You can use app.global. But catching open errors would mean less overhead, since getting the app list might be slow, if you have many apps and access rules that don't evaluate super quickly.

Erik Wetterberg