App: Error: Cannot replace view another change in progress

[mgaesslein]

SDK5/Scrollview
I have different views that I change during the runtime of the app (e.g../resources/index.view, ./resources/index-4.view) with 

document.location.replace(viewPath).then(...)

The information which view to use is loaded from the .cbor file.

I get a weird error when I try to switch views the first time I launch the app on the watch.

App: Error: Cannot replace view ./resources/index-2.view, another change in progress.

After launching the app once, this error never comes up again on subsequent launches.

My questions:
- What is this change thats need to be terminated first in order for the view to render properly at initial startup?
- Is there any indicator in the app that tells me that the SDK is ready to load the correct view? So I can wait for it.

Thanks for any help!

[JonFitbit · Accepted solution]

Do you mean the first time you launch the app after installation? We generate a binary optimised version, so it can be a little slower the first launch.

The error is reported when there's a view change operation in progress, started either via document.location.replace  or document.location.assign. The engine doesn't send a load event to the app, the view is considered loaded when the promise returned by the previous functions resolves / rejects. So could you be triggering multiple events?