Persistent "Cannot override getInitialView with different return type" Error (fr955 / SDK 8.1.1)

Hi everyone,

I'm developing a simple application/widget and I'm stuck on a persistent compilation error when targeting the Forerunner 955 (fr955) using Connect IQ SDK version 8.1.1.

The Error:

The compiler throws the following error on the getInitialView function definition line (line 147 in my current file):

ERROR: fr955: Cannot override '$.Toybox.Application.AppBase.getInitialView' with a different return type. Object of type '$.Toybox.Lang.Array<...>' does not match return type 'PolyType<$.Toybox.Lang.Array[$.Toybox.WatchUi.Views] or $.Toybox.Lang.Array[$.Toybox.WatchUi.Views, $.Toybox.WatchUi.InputDelegates]>'.

My Code:

------------------------

import Toybox.Application;
import Toybox.WatchUi;
// ... other imports ...
import Toybox.Lang;
import Toybox.System;

// --- View Class (PointCalView) is defined above, seems OK ---
// class PointCalView extends WatchUi.View { ... }

// --- Application Class ---
class PointCalApp extends Application.AppBase {

// Member variable to hold the single view instance
var mainView as PointCalView?;

function initialize() {
AppBase.initialize();
mainView = null;
System.println("PointCalApp initialized.");
}

// getInitialView function causing the error (around line 147)
// Note: No explicit return type hint on the signature
function getInitialView() {
if (mainView == null) {
System.println("Creating mainView instance.");
mainView = new PointCalView();
} else {
System.println("Returning existing mainView instance.");
}
// Note: No explicit cast on the return value
return [ mainView ];
}

// onStart, onResponse, onStop methods are here...
// They seem to work fine based on console logs (API call successful,
// data parsed, mainView.updatePoints called correctly on the stored instance)

// ... (onStart, onResponse, onStop code can be included if needed, but the error points to getInitialView)
}

// --- Entry Point ---
function main() as Application.AppBase {
var app = new PointCalApp();
return app;
}

------------------------

Here's the relevant part of my PointCalApp.mc file, including the PointCalApp class and the getInitialView function:

Troubleshooting Done:

• I have confirmed that the rest of the application logic (API calls, data parsing, updating the view's variables via mainView.updatePoints()) works correctly based on extensive console logging. The view variables do get the correct values.
• I initially had explicit return type hints (as ...) on the getInitialView signature and/or casts (as ...) on the return statement, which also caused this error.
• I have removed all explicit type hints and casts from getInitialView and its return statement, as shown in the code above.
• I have performed clean builds (deleting the bin folder).
• The error persists specifically for the fr955 target with SDK 8.1.1

My Question:

What could be causing this persistent return type mismatch for getInitialView on fr955 with this SDK version? What is the exact expected signature or return type structure that I should be using? Is there any known issue or workaround?

Thanks in advance for any help!